Detective Julian Vane hasn’t been back to Oakhaven since the night his sister, Elara, walked into the ocean and never returned. Thirty years later, the tide has receded further than it has in a century, revealing the ruins of a town that shouldn’t exist. When Elara’s silver locket is found on the shore—looking brand new and still warm—Julian is forced to return. He finds a town gripped by a “Salt-Rot” sickness and a mystery that stretches beneath the seabed. Every time the tide goes out, someone goes missing. The truth lies within the “Silent Parish,” a submerged cathedral that is finally rising to reclaim its due.