Sleepwalker is a guardian of the Mindscape, a dimension that borders on the minds of all intelligent life.
Now trapped in the mind of Rick Sheridan. When Rick sleeps, Sleepwalker escapes.
In the Mindscape,
a world where strange creatures live that borders on the minds of all intelligent life there is a force of beings that protect the sleeping minds of humans.
For if they were not protected, dangerous beings would enter the minds of sleeping humans.
One of the beings that protects the human minds, what humans call 'Sleepwalker', was tricked by his enemy, Cobweb, into entering the mind of Rick Sheridan.
After confronting Sleepwalker in many of his dreams, Rick tore off Sleepwalker's Imaginator. This caused Sleepwalker and Rick to bond together.
Now, whenever Rick Sheridan goes to sleep, Sleepwalker materializes into reality.
Rick and Sleepwalker have agreed that when Sleepwalker comes out, he fights crime.
Sleepwalker was created by Bob Budiansky and Bret Blevins and first appeared in Sleepwalker issue 1 (1991).
With the publication of Sleepwalker, a long dream of writer Bob Budiansky was finally fulfilled, as he had the plans for Sleepwalker as early as the late 1970's.