Rain, Capś grandmother, wants Cap to be happy and fit in at school. Cap also wants to fit in at school. Zachs wants go against both Rains and Caps. He wants to be popular and bully Cap to look cool and become likable.
Cap cannot fit in because Zach is terrorizing him. Zach cannot get Cap to look awkward because everyone sympathises him. Rain cannot be happy because Cap isn't happy.
Cap gets to fit in because everyone sympathises him and want's to be his friend. Zach realizes that being popular doesn't matter. Rain is able to live happily in a condo with Cap.