In the world of Phyrra, where magical creatures are not just myth but a constant threat, the Hunter's Guild stands as the last line of defense for the eight duchies. Seasoned hunters risk their lives to confront these beasts and protect the people. Ulric Ornthalas, a brooding hunter on probation, has always preferred to work alone, but his latest terms leave him no choice. His punishment? Take on a new partner, the tenacious field monstralogist Iowyn Morgnah, and ensure she stays alive-no matter what. The problem? Iowyn is a magnet for deadly situations, constantly attracting trouble and driving Ulric to the edge of his patience.

When a mysterious assignment brings them to Calluna, Iowyn's childhood home, things quickly spiral into something far more sinister than either anticipated. Children are disappearing near the water's edge, and what they find lurking beneath the surface is unlike anything they've ever faced. As old flames resurface, tensions mount between Ulric and Iowyn. Dangerous secrets, and fragile new alliances complicate their already precarious partnership. With time running out, they both must decide: trust in each other and their uneasy bond, or risk everything to go it alone.