The Mindscape is a dimension that borders on the minds of all intelligent beings and living things, inhabited by many strange creatures. Some of them are very dangerous, seeking to invade the sleeping minds of humans. The Sleepwalkers act as guardians to defend these minds and the Mindscape, 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.