In this quiet speculative novel by Catherine Queen, a man who has been haunted since childhood by visions beneath a lake discovers that he is not being lured toward death but toward a hidden threshold that regulates the boundary between life and whatever lies beyond it. When the seal beneath the water begins to destabilize, he must choose whether to preserve his own human existence or descend to become the living hinge that keeps the world from quietly unraveling. What follows is not an apocalypse but a transformation, as he accepts a new form of being and holds the seam between worlds steady so that others may live without ever knowing how close the surface came to breaking.