Elmo loves his fuzzy, well-worn blue blanket more than anything. After a feud with a friend, the blanket is carried away and sucked through a colorful, swirling tunnel into Grouchland, a distant world inhabited by Grouches and known as the yuckiest place on earth. Determined to get back his prized possession, the furry red monster sets off into Grouchland on an adventure that changes him along the way.