Anna, Addy, and Aura Winters were orphaned when they were very little. They are sent to live with their Uncle Kirk. After being there most of their lives, a family consisting of two girls and two boys come to the house. That is where things take a turn. The youngest of the family, Lucy, claims to stumble onto a world inside of an upstairs wardrobe. The Winters sisters believe her, but her siblings do not. What happens when they all enter the world with Lucy?