Full of fluff and stuff, MOOTSIE is a dust bunny floating under Riley's bed-a boy who never cleans his room. Growing bigger every day, she loves life with her messy friends: CLOTHES, BOOKS, TOYS, SHOES, and SOCKS.

But when a new-fangled contraption gets plopped down into Riley's sacred space, nowhere is safe-not even behind MILLY MONSTER, the largest stuffed animal under the bed.

Can MOOTSIE be brave, face her fears, and escape this daring danger?