The Mindscape is a dimension that borders on the minds of all living things, inhabited by many strange creatures. Some of them are very dangerous, seeking to invade the sleeping minds of humans. The Sleepwalkers act to defend these minds, almost as a sort of "dream police", apprehending such evil creatures. One such Sleepwalker was tricked by his archenemy Cobweb (who like Sleepwalker had a real name that is unpronounceable by humans) into entering the mind of a New York college student named Rick Sheridan and became trapped.

Rick himself is an ordinary human being, majoring in Film Studies as a college student. He lived in a Brooklyn apartment with his dog Rambo, where he worked as a building superintendent, doing maintenance work in exchange for living rent-free. He also earns a living as a part-time job teaching English to immigrants.

An issue of Sleepwalker is shown in the comic book scene of the movie, True Romance. Christian Slater's character is shown skimming through the pages but the description he gives of the story is not what is actually happening in the comic book.

This one must be a collector's item. It says so right on the cover.