一位年轻的少女|凯蒂|失去母亲后无法捕捉她的抑郁症。凯蒂已经失去了兴趣学校|她的朋友|和体操。所有这一切变化在夏天的时候，她被要求monkeysit吉比|她的科学老师的卷尾猴。以猴子照顾大张旗鼓地改变了她的生活。吉比的快乐，随遇而安的性格再次凯蒂对生活的热情。吉比帮她体操|更新的友谊（包括寻找潜在的男朋友）和克服她的克星|一个贱女孩谁出的一切击败凯蒂。

　　A young teenage girl, Katie, can not snap out of her depression after losing her mother. Katie has lost interest in school, her friends, and gymnastics. All that changes in the summer when she is asked to monkeysit Gibby, her science teacher's Capuchin monkey. Taking care of the monkey changes her life in a big way. Gibby's happy-go-lucky personality renews Katie's zest for life. Gibby helps her with gymnastics, renewing friendships (including finding a potential boyfriend) and overcoming her nemesis, a mean girl who is out to beat Katie at everything.