Beneath the frozen river that divides the city, something ancient is waking.
Riven Ashdown is a hunter shaped by danger, trained to track the unnatural things that slip through the cracks of disciplined magic and broken oaths. She has spent her life cutting threats out of the dark places of the world, never lingering long enough to be claimed by any one cause. Kael Thorn is bound to winter itself, a fae captain marked by oaths that grant him power while steadily eroding what remains of his freedom. His duty is clear, even as his loyalty fractures beneath the weight of secrets he was never meant to carry.
When a corrupted sigil unleashes a creature sealed by forbidden design, their separate worlds collide in a city that survives only because its worst truths remain buried. What begins as a single breach quickly reveals fractures within the political order, within the magic that governs daily life, and within the ancient bargains that keep the river and everything beneath it contained.
Bound together by blood-linked geometry and forces neither fully understands, Riven and Kael are drawn into a web of living magic, quiet conspiracies, and dangerous alliances. Each revelation forces them to question what they believe about duty, power, and the cost of choosing the greater good. As the city trembles on the brink of supernatural collapse, the pull between them grows impossible to ignore, even as their bond threatens to become the very thing that destroys everything they are trying to protect.
Fire Under Water is a dark romantasy of forbidden magic, slow-burning tension, political deception, and the terrifying cost of awakening powers that were never meant to rise again.