There is a monster in Timmy's dreams, and it has been there every night, chasing him relentlessly. His dad sets a trap. One night, Timmy catches it — and the monster, caught and cornered, turns out to be embarrassed rather than threatening. He introduces himself as Timms, and his explanation is unexpectedly sad: he was chasing Timmy because he was afraid of being forgotten. If Timmy stopped dreaming about him, Timms would simply cease to exist, unable to enter anyone else's dreams. Timmy proposes a compromise: Timms can appear in his dreams a little at a time, so Timmy can get used to him gradually. In the morning, the trap holds small blue marks left by the visitor who spent the night inside it.