The film stars Dana Carvey as a private investigator who is the key witness in a murder case.

After suffering a head injury, however, he has developed a rare form of amnesia that causes him to forget anything that happened to him the previous day, which makes it hard for him to know whom to trust, or if he even knows them at all.

He realizes from a recording he made for himself the previous night (Sunday) – to keep himself in the know – that he is a private investigator in Los Angeles, and acquired the condition after being injured during a case.

Pogue tells himself not to reveal his condition to anyone, as he is the key witness in the case against the man responsible for his amnesia.

Appearing on the recording is a strange woman, Sarah Novak, who informs him she has been living under the alias Beth Holly in San Francisco, and she has come to L.A. because she is being blackmailed.

He takes Sarah to a pay phone to call the people who are blackmailing her; Pogue notices that her handwriting is not the same as on the note the coin was wrapped in.

During the trial, Pogue falls back in his chair and hits his head, then suddenly regains his memory.

[7] Audiences surveyed by CinemaScore gave the film a grade B+ on scale of A to F.[8] David Nusair of Apollo Guide stated, "You're virtually guaranteed to have forgotten it by the following morning.

"[9] Brian Lowry of Variety wrote that although the film has "a few inspired comic moments", it is a rehash of Groundhog Day.

[10] Caryn James of The New York Times wrote that it is "perfectly pleasant to sit through, but always feels as if it's about to become funnier than it is".