Kirsten and Mark are attacked following a tryst on the beach, so the Mervishes invite the young couple to stay with them to recuperate. They accept but slowly find themselves captive in a sadistic psychological experiment.

Simultaneous arrivals in Aghios Nikolaos create an unbearable strain on the Shepherds' marriage. Erik is tempted by the alluring young Jocasta with whom he has shared a previous flirtation, while Donald Culley returns to continue the relationship he and Ann started.

Imogen befriends Ann as Krasakis reminds Erik that Ann killed Culley, and Nikos faces the death penalty for the crime. Ann seeks psychiatrist Hugh Russell in an attempt to regain her memory, though Erik objects. Mace searches the Shepherds' bedroom. Webber invites the Shepherds to his hotel, and while there, Ann meets Russell, convincing him to administer her sodium pentathol.