Banyoles, 1988. Iván’s life changes forever when his best friend, Jan, disappears. While the whole town searches for him, only Iván discovers the truth: Jan is hiding by the lake, refusing to go home for reasons he cannot explain.

Over a few stolen days of freedom, the two boys retreat into their private world, celebrating their friendship far from the eyes of adults. But when they come face to face with death and uncover a terrifying secret, Iván realizes that the true monsters are not the ones said to lurk beneath the lake’s dark waters, but the ones waiting on shore.