Winnie Foster led a sheltered life. She was never allowed to leave her fenced in yard. However, one day she decides to run away. Across from her house is a wood, where Winnie runs to. In the wood, Winnie sees a young man drinking from a spring. Winnie was never to see the spring, no one was ever to see the spring.
Jesse Tuck has not aged in 84 years and he looks as if he is just 17. Once Jesse spots Winnie as he is hiding the spring, he calls for Mae & Miles Tuck, his mother and brother. They decide to take Winnie back to their home for a couple of days, while they tell her their story and to make her understand why she should never tell anyone about the spring.
The Tuck family, Angus, Mae, Miles, and Jesse, explain their story to Winnie and how the spring has effected all of them. While staying with the Tucks, Winnie understands the Tucks and begins to care for them. An accident happens at the Tuck’s house and Mae gets arrested. Winnie and the boys must help get Mae out of jail before their secret in revealed.