Crash and Wyatt are grounded while Mel takes the girls out for the day. Jasmine is accidentally left behind and witnesses Crash and Wyatt destroying one of Mel's things. The guys spend the rest of the day trying to please Jasmine, so she won't tattle on them.

After Crash eats a book on how to be a mechanic, he develops the ability to fix vehicles and becomes "Grease Monkey" Crash. Wyatt and Crash take advantage of his newfound skills and open a vehicle repair shop.