The end of summer means two things for the twins Nicholas and Samantha. First, pack in a lot of fun before school starts. Second, get presents for their birthday. But this year has its share of trouble when Nick and Sam get caught sneaking peeks at their hidden presents. And that's just the start! Later, Nick turns a family hike into a stinky event. Sam discovers just how dangerous disobedience can be. And an unwise buying spree leads to more problems than Nick could imagine. Will the twins be able to celebrate their birthday this year?