Maddie finds out that her mom, Kathy, has a boyfriend who she's been hiding from Maddie. When Maddie gets curious and investigates him, she finds out that he has three sons, one of which is only months apart from Maddie. She doesn't think much of it until she has to go to Kathy's boyfriend's house to meet him and his sons, including Landon. After meeting Landon, she realizes he is just a snobby and videogame-playing typical teenager. As they are forced to see each other more, she sees a different side of him. They realize they have a lot more in common then they thought, the only problem is they could become step-siblings.