Chapter 28
Subtle Vibration
Emma couldn’t stay in the cottage another minute.
Not because she was angry—though part of her still simmered with the shock of Zach's revelation.
Not because she was running—though her legs ached to move, to put distance between herself and the weight of his confession.
She needed space. Room to think without the walls pressing in, without his presence filling every corner, making it impossible to separate her own thoughts from the magnetic pull of him.
He was outside now, doing his regular perimeter check.
She slipped out the front door before she second-guessed herself, before Zach returned and stopped her.
The late afternoon air hit her face, warm and salt-touched. She breathed it in, letting it clear the fog in her head. Her sneakers crunched on the gravel path as she started walking with no particular destination. Just… away. Just movement.
She’d spend the day coordinating the evacuation, and she was mentally exhausted.
Zach can do things no one else can.
The thought circled through her mind like a marble in a bowl, unable to settle. She saw it with her own eyes—the way he moved during the attack, faster than possible, stronger than human. The efficiency. The lethal grace.
Other than catching that bolt, she had the impression he’d been holding back, trying to act normal.
Had he been injured because of me? Because he didn’t want her to see what he was?
An instinctive part of her had always sensed something extraordinary about him. That controlled power beneath his taciturn exterior. But knowing and understanding were two different things.
Her fingers played with the coin in her pocket. She’d been carrying it on her since lunch in the village, unable to shake the belief that it meant something. That it was important somehow.
‘The Windstone was a gift from the wind itself, crossing the sea to protect the island.’
Ana-Luz’s story whispered through her memory. Emma pulled the coin out, studying it as she walked. The spiral glyph caught the slanting sunlight, seeming to shimmer for a moment. The design was so precise, so deliberate. Not decorative. Purposeful.
She frowned and stopped walking.
The spiral… she’d seen it before. Not on the coin. Somewhere else. Recently.
Emma spun, scanning the landscape. The cliffs rose to her left; the path winding upward toward the rocky overlook where she stood with Nick and David that sunrise eons ago. Where they talked about Zach arriving the next day. Where there was a stone marker with the—
The spiral.
The same pattern. She was certain.
Her feet moved before her mind caught up, carrying her toward the cliff path. She told herself she was only checking. Curious. That she needed the walk to clear her head, and what did it matter which direction she went?
The coin was warm in her palm, almost alive against her skin.
The path narrowed as it wound around, away from the resort and toward the wilder edges of the island.
Wind rose from the sea, stronger here, tugging at her hair and jacket.
The scent of salt intensified. Emma’s heart picked up pace—not from exertion, but from something else. Anticipation. Recognition.
The cave entrance appeared ahead, a dark mouth in the cliff face. Solombra Cave. Shadow and light. She’d only glimpsed it from above, but up close it was larger than she expected. More imposing. The opening yawned before her, cool air breathing out from its depths.
Emma hesitated at the threshold.
This was foolish. She didn’t bring a flashlight. Didn’t have any supplies. Didn’t even know if the cave was safe or stable or—
The coin pulsed warmly in her hand.
She took a deep breath and stepped inside.
The atmosphere shifted, like passing through an invisible barrier.
The temperature dropped, and a shiver ran up her spine.
Damp stone surrounded her, slick with moisture.
The constant drip, drip, drip of water echoed from somewhere in the cave, rhythmic and ancient.
The scent of salt and seaweed enveloped her.
Outside, waves crashed against the rocks, but inside the sound muted, transformed into something haunting and far away.
Emma’s eyes adjusted to the gloom. Light filtered in from the entrance, enough to make out the surroundings if she stayed close to the opening.
Rough stone walls, worn smooth by centuries of wind and water, rose only a foot or two above her head.
The ground was uneven beneath her feet, scattered with small stones and shells left by high tides.
Then she saw them.
Carvings.
Not random erosion or natural striations. Symbols. Deliberate marks etched into the walls. Emma moved closer, her breath catching. The carvings were everywhere once she knew to search for them—spirals and curves, patterns evocative of wind and waves. Shapes that echoed Ana-Luz's fanciful story.
The Red Veil. Captain Reyes. The Windstone.
Her fingers traced the nearest glyph, rubbing over the grooves worn smooth with age. How old were these? Decades? Centuries? Who carved them? The island's original inhabitants? Some ancient culture lost to time?
The spiral design beneath her fingertips matched the one on the coin.
Emma’s heart hammered as she moved along the wall, searching, although she didn't know what for. There—a larger spiral, carved at chest height. The size and shape appeared to be an exact match to the coin's design. As if the coin had been made from this carving. Or for it.
Without understanding why, acting on pure instinct, Emma pressed the coin into the carved groove.
It fit.
For a heartbeat, nothing happened. Then a faint vibration ran through the rock beneath her hand. A whiff of air brushed across her nape, like the cave itself took a deep breath. The sensation traveled up her arm, raising goosebumps, making her pulse spike.
She jerked her hand back. The coin clattered to the ground.
The cave went still again. Silent except for the dripping water and distant waves.
What the hell?
Emma’s breathing came fast and shallow. She stared at the carved spiral, half-expecting it to do something else—
“Emma.”
The growl from behind her made her jolt, heart leaping into her throat, although she immediately recognized it.
She whirled to see Zach standing at the entrance, his silhouette dark against the afternoon light. She didn’t need to see his face—red hot fury radiated from him, tight and controlled and barely contained.
“You disappeared without telling me.” His voice echoed through the cave, low and dangerous. Each word precise and clipped.
Emma’s hands clenched into fists. “I needed space.”
“You don’t get to just leave.” He moved into the cave, and as the light shifted, she could see his face—jaw locked, eyes battle-gray and fierce. “Not after what happened. Not without—”
“Without your permission?” Defensive anger flared hot in her chest. “I’m not your prisoner, Zach.”
“That’s not—” He bit off the words, clearly fighting for control. “Someone tried to kill you yesterday, and he is still out there. You think I’m going to let you wander off alone because you’re feeling overwhelmed?”
“Let me?” The carved spiral beside her began to glow. Emma ignored the oddity, too focused on her anger; the air between them thick with everything unsaid.
She took a step toward him. Her pulse throbbed in her throat, in her wrists, pounding with adrenaline and frustration and something deeper she didn’t want to name.
The glow strengthened. Zach’s gaze flicked over her shoulder. He froze.
“What the hell is that?”
Emma spun around. The spiral glyph she had pressed the coin into was shimmering—not bright, just a soft luminescence like moonlight on water. Subtle enough that she might miss it in full daylight, but unmistakable in the cave’s dimness.
Her stomach fluttered at the sight. “I don’t… that wasn’t happening before.”
Zach moved beside her, his focus now on the wall. His hand hovered near the glowing symbol, but didn’t touch it. “What did you do?”
“Nothing. Just… the coin.” Emma knelt and retrieved it from where it had fallen. “I found these carvings, and the spiral matched the design on the coin, so I…” She gestured helplessly. “I pressed it into the groove.”
“And it glowed?”
“No… there was a vibration. Like the stone was alive. I yanked out the coin and it stopped, but now—” She looked at him, mind racing, trying to categorize what was happening. “The glow started after you arrived.”
Their eyes met. Something shifted in the air between them, as tangible as the stone beneath their feet.
Zach turned back to the wall, his expression indecipherable. “There are more carvings. In the back chamber.” He pointed toward the deeper darkness at the back of the cave. “More intricate. I found them when I did the security survey of the island.”
Emma shifted closer to study the symbols. They connected—winding patterns that suggested movement, flow. Wind and water. And something else. Power.
“Ana-Luz’s story,” she said. “The pirate captain, the Red Veil. The Windstone. These carvings… they’re showing the same designs.”
“Mythology.” Zach’s voice lacked conviction.
“Says the walking legend himself.” She met his eyes again. “After everything you told me? Can you really dismiss it as stories?”
The question hung between them. The cave seemed to hold its breath, water dripping in measured rhythm like a heartbeat.
Zach’s hand rose to the back of his neck—a gesture she now recognized as him processing data. “The abilities I have… we’ve never known where they came from.”
“Maybe it came from here.” Emma gestured to the carvings. “From this island. Or whatever people created this.”
“Doubtful. The oldest lore I found came from Japan. Millenia older than that story.” He leaned in closer to the glyph as he spoke. The shimmer in the glyph strengthened. Emma leaned closer, and it intensified further.
“We’re doing that,” Emma breathed. “The cave is reacting to us. To both of us.”