The story of Winnie Foster, a teenage girl on the cusp of maturity. Winnie longs for a life outside the control of her domineering mother. When lost in the woods near her home, she happens upon Jesse Tuck, a boy unlike any she's ever met before. He and his family are kind and generous, and they immediately take her in as one of their own. However, the Tucks hold a powerful secret, and with the mysterious Man in the Yellow Suit tracking them down, they fear that the world as they know it could end. Ultimately, Winnie must decide whether to return to her life or stay with her beloved Jesse and his family forever.