Champion swimmer and Olympic hopeful, Dawn Beaumont has been injured in a car crash she caused. Haunted by guilt over the death of a passenger, her career in ruins, her body damaged and scarred, she flees to Moon Island. Scientist Grace Ramsay is on the island secretly evaluating its potential as a toxic waste dump far from civilization. She decides her cute new neighbor will make for the perfect holiday fling. But Dawn won't play ball and denies she is a lesbian. Beset by troubling nightmares rooted in the past, and increasing ambivalence over her job, Grace sets out to prove otherwise, with unexpected consequences. Meanwhile Annabel Worth, the owner of the island, is determined not to sell her home to Grace's employer, the Argus Chemco conglomerate. Then her plane goes down in the Pacific in suspicious circumstances.