"It's way harder being a guy than a girl." "Is not." "Is too." "Is not!" "Is too!"

So begins another madcap McDoogle mishap as Wally agrees to switch places with Wall Street (his best friend even if she is a girl). Teachers, parents, friends, everyone is in on the act as the two try to survive 72 hours in each other's shoes. It's a custom-made Wally catastrophe that includes: exploding Home Ec cookies (apparently Wally used gun powder instead of baking powder), baby-sitting a mob of out-of-control monster babies, and imprisoned 2.2 hours in the bathroom every morning to fix his hair. Last, and by no means least, Wally must replace Wall Street as a star in The Nutcracker ballet!

All in all it becomes one of Wally's greatest misadventures as he finally learns the important lesson of honoring and respecting others.