Mabel centers on Callie, whose only friends are the plants and trees that surround her home. When her dad’s job moves the family to a sterile subdivision, she is utterly isolated—except for her best friend, a potted plant named Mabel. To Callie, Mabel is a peer, a fellow being, maybe overlooked or unseen, but still very much alive.

A chance encounter between two women develops into something more over their shared appreciation of art.

John Mulaney and his kid pals tackle existential topics for all ages with catchy songs, comedy sketches and special guests in a nostalgic variety special.