Mrs. Manson (Irma P. Hall) lives with her cat. She is kind, kind and full of wisdom, but she becomes a stumbling block in a casino vault robbery. The mastermind of the robbery is the notorious Professor Higginson (Tom Hanks). He claims to be from the University of Mississippi, and his every move is full of poetic spirit, which deceived Mrs. Manson. Under the leadership of Higginson, a large group of people from all walks of life moved into Mrs. Manson's rented apartment, where they pretended to rehearse church songs, but in fact they were opening an underground tunnel leading to the vault. Of course, such a difficult task can be handled by all kinds of magical powers. There are generals who have dug tunnels, prop masters on the set, black people who work odd jobs in casinos, and even a former American football player. Everyone is working hard, and the plan is about to succeed, but they never thought that Mrs. Manson will become their nightmare...