In a small town on the Pacific coast, the life of a schoolteacher, Paul, is shaken by the disappearance of several children and the strange relationship he has with his young student, Lucas. The boy, withdrawn and enigmatic, lives with his brother and his father, who is in a state of intense weakness and secrecy. Lucas’s situation becomes even more disturbing when Paul discovers that he brings home something he shouldn’t have: a supernatural creature that awakens ancient legends of the region.