When Tina and Gemma get more than they bargained for in a revealing art class, Calvin can't hide his jealousy and takes drastic action. Also, Dave, Marty and Malcolm team up to crack the case of an unfinished mystery novel.

Owner of auto-repair chain Motor Boys, tries to steal Calvin's customers, the Butlers and Johnsons join forces on a plan to drum up business and give back to their community.