Amy, Kiki and Carla – three under-appreciated and over-burdened women – rebel against the challenges and expectations of the Super Bowl for mothers: Christmas. And if creating a more perfect holiday for their families wasn’t hard enough, they have to do all of that while hosting and entertaining their own mothers.

Koko, Brewster and Wilson are three young, adventurous trainee "chuggers", learning about working on the railway in the town of Chuggington, with the help of the railway controller, Vee, the older engines, and their human friends.