A young girl, Molly Macaroon, hears strange noises coming from her closet, where all her imaginary friends live. Molly follows the noise and discovers her best imaginary friend, Miss Lolly, has been captured by a strange creature that lives in the woods. This creature, Mortimer the Maniac, soon kidnaps Molly too and keeps her in his lair. Molly discovers she and Mortimer share a love of drawing, and she learns that maybe he is so grumpy because he doesn't have any friends, like her. This children's adventure story is both exciting and heart warming. Molly learns not to judge people based on reputation or appearances.