Leonard Shelby (Guy Pearce) is a retired insurance agent, is dedicated to investigate the murder of his wife, the problem is that he knows who killed her but can not remember him when he tried to catch the murderer hit himself on the head I am unconscious and when I wake up his memory is affected and now it prevents him from storing memories, the memories he gets in the day he loses them when he wakes up in the morning
To remember the clues you are getting tattoos name or phrases that can help you remember
This film is presented in reverse order and confuses even more with a protagonist who can not create new memories and who looks for the murderer of his wife.
Ultimately this psychological thriller will keep you guessing, deciphering and classifying events long after the first time you see it (believe me see it backwards does not help anything)