Memento is about a man with anterograde amnesia who is trying to find his wife's murderer. The story is told in two timelines, one moving forward and one backward, to reveal different aspects of the plot. The film is classified as a mystery and noir genre due to its dark tone, use of black and white, and an ambiguous protagonist. Viewers must focus on key details to piece together the plot, making repeat viewings a different experience. The main actors are Guy Pearce as the protagonist and Carrie-Anne Moss as a femme fatale who complicates his investigation.