After years of taking her human family on summer vacations, a little camper is left alone in a backyard, feeling sad and lonely.

Hattie is a happy little camper. She has extra-cozy beds, sturdy little tires, and colorful tin siding that gently pings when it rains. Each summer Hattie's human family hitches her up and drives out from their city home to a campsite in the woods. Hattie enjoys these vacations with her family, and she especially loves watching the children laugh and play. Hattie keeps her family warm and safe and dry.

But as the years pass, the children grow up and move on to busy lives. No one has time for camping trips or Hattie anymore, and she is left all alone in the backyard. As seasons come and go, vines grow around Hattie; she's dusty, dirty, and a little run-down. Now woodland animals make their homes inside her walls. Hattie doesn't mind. She likes the company but it's not the same as keeping her human family safe and warm. She misses them. She misses the children and their laughter. Will Hattie ever know that love and happiness again?