Mazelike dream worlds contain the other shared dreamers — all sleeping in a special drug-induced state in close proximity to each other.

The rules of dream worlds are explained: individuals hurt in a dream world will experience pain in a very real sense, but in-dream death merely causes the individual to wake.

When I was twelve years old I spent two months in a hospital and during the depressing long days with no other entertainment around I drew day after day the dream worlds I wanted to go to.