What happens when a child outgrows his trusty Imaginary Friend, the pal that stuck with him through all of the highs and lows of growing up? Well, these creations pack up and head for Foster's Home for Imaginary Friends! Foster's is a one-of-a-kind Victorian mansion filled with hundreds of unique characters from all over the world, thought up by completely different children for completely different reasons. These creatures all live together in this...

When Ian Lightfoot comes of age, his mother gives him the magical staff of his late father, which will let him cast a spell to spend one more day with his dad. But the spell goes awry and he has only 24 hours to set it right, so he and his older brother embark on an epic quest, with their mother trailing after, trying to protect them from a dangerous curse.