Best friends Ashley Sanchez (Ash) and Ashlee Taylor (Lee) agree that being a sister can be tough. What they dont agree on is which of them has it tougher. When they both argue that their situation is worse, the two girls decide to switch places for a day. Ash cant wait to spend time with Lees cool older sister, Mallory. Lee is excited to bond with Ashs adorable baby brother, Sam. But when the sibling swap doesnt go as expected, will Ash and Lee still wish to trade places?