Dusa Thrasman is 16 years old and in trouble. Snakes haunt her dreams, leaving her afraid, exhausted, and ill. Her doctor has tried everything. Then Dusa sees a TV interview with two doctors, the Gordon sisters. Their specialty: curing snake dreamers. But in order to be treated, she must go with the Gordons to their remote clinic on an isolated Greek island.When Dusa arrives at the clinic, the only people there are a strange boy named Perse and his father, the Gordons' servants. Perse tries to warn Dusa about the Gordons, but his English is hard to understand.

Can he really mean that they haven't aged in a hundred years? And who was their sister, the original snake dreamer, the one they want to make whole again?.