Cut off from the main island of Trinidad by a glistening green sea, Chacachacare has few inhabitants besides its colony of lepers and a British doctor who fled England with his three-year-old daughter, Virginia. An amoral genius, Peter Gardner had used his talents to unsavory ends, experimenting, often with fatal results, on unsuspecting patients. Blackmailed by his own brother, Peter ends up on the small island as England's empire is starting to crumble. On Chacachacare, Peter experiments chiefly on the wild Caribbean flora-and on the dark-skinned orphan Carlos, whose home he steals. Though Peter considers the boy no better than a savage, he nonetheless schools the child alongside his daughter. But as Carlos and Virginia grow up under the same roof, they become deeply and covertly attached to one another.