Sibling duo Max and Maple spend their days adventuring with their dependable red wagon and its magical little Wheelios in the yard behind Grandpa Tony’s Fix-It Shop.
Max and Maple are tasked with watching their bestie Thelma's plant, and disregard her "boring" instructions and take it on a wild adventure. As they recognize the mess they made of Thelma's plant, she shows up-- Max and Maple have to learn that being a good friend means being an honest one that owns up to their mistakes.