In 1997, the island of Manhattan has been walled off and turned into a giant maximum security prison within which the country's worst criminals are left to form their own anarchic society. However, when the President of the United States crash lands on the island, the authorities turn to a former soldier and current convict to rescue him.
Art Dodge is a painter-turned-gallerist drowning in debt. He gets in over his head when a con job leads to an engagement with a rich divorcee. He gets in deeper when he falls for her sister, and invents a twin brother to be her beau; and deeper still when his fiancée's ex-husband comes looking for revenge.
In a futuristic world where the polar ice caps have melted and made Earth a liquid planet, a beautiful barmaid rescues a mutant seafarer from a floating island prison. They escape, along with her young charge, Enola, and sail off aboard his ship.