杰西（乔什·哈切森 Josh Hutcherson 饰）是个过得不怎么快乐的孩子。他在学校里受同学欺负，在家中又无法得到父母的宠爱。只有两个人能为他的童年带来亮光——一个是音乐老师，另一个便是刚转校来到班上的莱斯利（安娜索菲亚·罗伯 Annasophia Robb 饰）。 　　莱斯利以她独特的方式感染了生活暗淡的杰西，慢慢打开了他的生活的另一扇窗。在河的另一边，他们要建造一个叫做“特雷比西亚”的王国，他们在树上打造一个屋子，王国的成员有妖怪、马蜂军团、松鼠和秃鹰。这个幻想的天地创造了他们每天放学后最好的时光。 　　然而，童话毕竟太虚幻，杰西和莱斯利的特雷比西亚世界，迎来了风雨飘摇的一天……Jesse Aarons trained all summer to become the fastest runner in school, so he's very upset when newcomer Leslie Burke outruns him and everyone else. Despite this and other differences, including that she's rich, he's poor, and she's a city girl, he's a country boy, the two become fast friends. Together, they create Terabithia, a land of monsters, trolls, ogres, and giants and rule as king and queen. This friendship helps Jess deal with the tragedy that makes him realize what Leslie taught him.