Malcolm is upset about having to dance in front of the school with the other Krelboynes, so he decides to ditch school. But when Hal convinces him that taking him to school will be the highlight of his day, so Malcolm is guilted into going. The boys are shocked though when Hal tells them they aren't going to school. He takes them to the racetrack to see the last race of the best driver ever Rusty Malcolm. After two laps, the boys decide to get some cokes. While arguing over who should watch him though, the boys lose Dewey and enter a forbidden room, only to be caught by a security guard. Meanwhile, Francis' disobedience affects the rest of the cadets.
Malcolm is a regular high school kid trying to navigate his way through life despite the various obstacles thrown in his way a complete misunderstanding of girls, the constant burden of masterminding plans to get himself and his brothers into or out of trouble, and a miserable job at the Lucky Aide not to mention a severe case of teen angst.
Although Malcolm has a genius IQ, he can't seem to make sense of the opposite sex, much less his embarrassing family. Lois is the outspoken, opinionated mom, who still manages to rule the roost even though her boys are growing wise to her crafty ways. Hal, a dad who is just a bumbling, big kid at heart, often finds himself creating more chaos than his five boys combined.