Undercover Maisie is a 1947 American comedy film directed by Harry Beaumont and starring Ann Sothern, Barry Nelson, and Mark Daniels.

When Maisie accurately and thoroughly describes the woman to the police, Lieutenant Paul Scott from the bunco squad is impressed at her observation skills.

After training, Maisie is sent on her first mission: to catch a con artist called Willis Farnes, who poses as a psychic named "Amor".

After the session, Maisie "accidentally" runs into real estate broker Gilfred I. Rogers, who is really Farnes' accomplice.

Maisie finds some documents left behind by Rogers in her apartment, and among them is an invitation to an event that same night, which Farnes is hosting.