Rosie Kawai loves Hawaii. She loves to surf, swim, be with friends and family, and especially the parties. But mostly she just wants to live out her dreams of a singer. So her family decided that she may go to California for the summer and live with her older sister Alana. While in California she meets a boy. But this isn't a normal love story. She meets a boy but in a bad way. They hate each other and that's all it is to it. But what happens when they are forced interact because their brother and sister date. This boy is Hayes Grier. Will Hayes get in the way of her singing. She only has three months to make her dreams come true. Can she do it? Find out in Three Months with Him.