Megan promises to cease pulling pranks for three months if Drake and Josh agree to house the sheep she adopted. It seems like a good deal to the boys, until they discover what damage an unpenned sheep can do.

Megan and her classmates quickly become fed up with a new, very strict teacher: her big brother Josh. Meanwhile, Drake sees an opportunity to get a brilliant young drummer to join his band.

Drake is assigned a child to mentor and reacts with disbelief and disappointment when the kid favors Josh over him.