Thomas, 19, wakes up in hospital after three years in a coma. He doesn't remember anything. The psychologist Anna tells him that his family was murdered and that he is the only survivor of the massacre while his sister Laura is still missing. Thomas attempts to piece together his fragmented memories. Helped by the psychologist, reconstructs his past to finally unmask the murderer and try to find Laura. But real unsuspected memories then arise from this mental labyrinth