Leonard Shelby is tracking down the man who raped and murdered his wife. The difficulty of locating his wife's killer, however, is compounded by the fact that he suffers from a rare, untreatable form of short-term memory loss. Although he can recall details of life before his accident, Leonard cannot remember what happened fifteen minutes ago, where he's going, or why.
Memento is a 2000 American neo-noir psychological thriller film written and directed by Christopher Nolan, based on the short story "Memento Mori" by his brother Jonathan Nolan, which was later published in 2001. The film stars Guy Pearce, Carrie-Anne Moss, and Joe Pantoliano. The film follows Leonard Shelby (Pearce), a man who suffers from anterograde amnesia—resulting in short-term memory loss and the inability to form new memories—who uses an elaborate system of photographs, handwritten notes, and tattoos in an attempt to uncover the perpetrator who killed his wife and caused him to sustain the condition.