Annie hears that her foster parents are going to send her little brother, Willie, to another foster home. She can't let that happen! She devises a plan for the two of them to run away in the middle of a wintry night. That's when the adventure begins!

Annie is the protective sister and Willie is bold and comical. They meet new friends and find places to sleep and eat. But how long can they last in the winter weather? And who is the strange man watching them?

When they are given a card with only an address written on it, will this be the break they need or will it spell disaster?