Best friends Ashley Sanchez Ash and Ashlee Taylor Lee agree that being a sister can be tough. What they don’t 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 can’t wait to spend time with Lee’s cool older sister Mallory. Lee is excited to bond with Ash’s adorable baby brother Sam. But when the sibling swap doesn’t go as expected will Ash and Lee still wish to trade places?