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.
"Sir Max" and "Her Mapleness" are playing capture the castle in the backyard to see which of them is going to be crowned royalty that day. But when Max takes the game too far and gets stuck, he has to depend on his sister to come to his rescue.