The storm has passed, but the deadliest secrets are buried underwater.
Amateur sleuth and architectural expert Rowan Adler survived the hurricane, but the battle for her island estate is just beginning. To meet her inheritance deadline, she desperately needs to rebuild Widow's Keep's rotting ferry docks and crumbling stone boathouse. But when an elite mainland dive team arrives to survey the underwater pylons, their lead engineer is murdered in the deep-his air hose cleanly sliced.
The police rule it a tragic accident, but Rowan and her protective harbormaster, Finn Locke, know better. The corporate saboteurs have escalated from intimidation to deadly underwater warfare.
To find the killer, Finn is forced back into the dark, churning ocean he left behind, while Rowan acts as his lifeline on the surface. When a sudden squall forces them to take shelter in a cramped, freezing diving bell, the simmering tension between them reaches a boiling point. But the clock is ticking. The killer has planted explosives on a deep underwater fault line.
Rowan and Finn must dive into uncharted, claustrophobic caves to defuse the bomb... or watch the island sink into the abyss.