Malcolm, his sister Maura, Eddie and his mother Sheila are preparing a surprise party for Malcolm's father Marcus. Maura and Sheila start arguing over what they believe to be Marcus' favorite cake, but things really start heating up when Eddie's Grandpa, Aunt Ruby, Uncle Lud and Cousin Doyle make an unexpected entrance.

A gorgeous bandleader (Cindy Herron) breaks up Malcolm and Ashley.

The guys deal with a new rival for their business, a beautiful buxom woman who opens a dance club down the street from the Fifty-Fifty Club, by holding a bogus contest to attract new customers. The trouble comes when the guys decide to fight fire with fire, and rig a bogus contest of their own, but with disastrous results.

Malcolm and Eddie try to outdo the rave review for Mia's nightclub by convincing her DJ boyfriend to do a live broadcast from the Fifty-Fifty Club. But when she sees how successful the broadcast is, Mia resorts to an outrageous lie about Malcolm to turn things back in her favor.