Party animal Tommy Callahan is definitely a few cans short of a six-pack. But after seven years, Tommy's finally earned his diploma - and a cushy job at Callahan Auto Parts. Returning home, Tommy gets some more great news: his dad is marrying a real "10," and Tommy will get the stepbrother he always wanted. Awesome! But as the family business starts tanking, Tommy's got to hit the road with his dad's right-hand man to save it.