The fate of Alex, a twenty-one year old who has lived all his life alone with his mother in a small house near a lake in the village of Trialba, is intertwined with that of Doctor Petrov, an elderly psychotherapist with an unusual interest in solving local crimes and not. When Alex begins to suffer from nightmares he turns to Doctor Petrov, an expert in regressive hypnosis. The discovery of a strange object found near the house could be associated with a dark mystery linked to murders of the past, present and, probably, the future.