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 welcomes her cute new neighbor, imaging Dawn could be a pleasant diversion from her secret mission to evaluate Moon Island for corporate purchase by a chemicals giant looking for a waste dump far from civilization. But Dawn won't play ball, in fact she denies she is even a lesbian. Beset by troubling nightmares rooted in the past, and increasing ambivalence over her job, Grace sets out to prove otherwise. Meanwhile Annabel Worth, the owner of the island, is determined not to sell her home to a chemicals conglomerate. But then her plane goes down in the Pacific in suspicious circumstances.