Entered by a thousand unsuspected gateways - built by a race lost in the clouds of time - Well World transforms creatures of any sort into different forms. So, spacefarer Nathan Brazil is not surprised to find himself accompanied by a batman, an amorous female centaur and a mermaid as he sets out on his strange mission. Yet Nathan Brazil's own metamorphosis is more terrifying than any of the others - and with the gradual return of his memory comes the secret of the Well World.