Héctor is a young man who, after a chance encounter with his wife Clara, decides to go for a hike in the countryside. During his walk, he witnesses a murder taking place and, to avoid being seen, ducks into the bushes. To get away, he kills the murderer and dismembers the body, hiding the remains in a nearby river.However, in the process of escaping the scene, Héctor accidentally crosses over his own path, but at a different time. He then discovers that he has traveled
back in time by one hour. Panicked and disoriented, Héctor starts to try and make sense of his situation and the implications of time travel on his life.As the hours pass by, Héctor continues to travel
back in time by one hour, each time finding himself in a different version of the present, but with slight differences. He starts to notice that every time he crosses his own path, every minute detail changes, creating a new reality. The more he travels back in time, the more he becomes aware of the consequences of altering the past, including the death of his own wife.Clara is the only constant figure in each reality, but her fate varies greatly. In some versions, she dies in a car crash, while in others she disappears. Héctor's attempts to prevent her death lead to a series of tragic and violent events, ultimately forcing him to confront the destructive nature of time travel.As the story unfolds, it becomes clear that Héctor's actions are creating a reality where he is the only survivor, and Clara's fate is sealed. With each new reality, Héctor's desperation and paranoia grow, as he becomes trapped in a desperate attempt to alter the course of events. As the hours tick by, Héctor is forced to face the consequences of his actions, and the true horror of his situation is revealed.In the end, Héctor is left with a haunting realization: the more he tries to control the past, the more he loses control of his own destiny. The film builds towards a heart-wrenching conclusion, where Héctor is left alone, surrounded by the remnants of his failed attempts to alter the past. The movie ends with a haunting image of Héctor, lost in time, forever trapped in a cycle of despair and regret.