A true story about Frank Abagnale Jr. who, before his 19th birthday, successfully conned millions of dollars worth of checks as a Pan Am pilot, doctor, and legal prosecutor. An FBI agent makes it his mission to put him behind bars. But Frank not only eludes capture, he revels in the pursuit.

When a street-smart FBI agent is sent to Georgia to protect a beautiful single mother and her son from an escaped convict, he is forced to impersonate a crass Southern granny known as Big Momma in order to remain incognito.