Richard, a young American seeking adventure in Bangkok, stays in a drab travelers hotel in Khao San Road where he meets a young French couple, Françoise and Étienne, and he immediately becomes attracted to Françoise. He also meets the eccentric Daffy, who tells him of a pristine, uninhabited and restricted island in the Gulf of Thailand with a beautiful hidden beach and lagoon. Daffy explains that he and other travelers settled there in secret several years earlier, but difficulties arose and he chose to leave. Daffy commits suicide, leaving Richard a map to the island. Richard convinces Françoise and Étienne to accompany him to the island, and the three travel to Ko Samui. After getting locked out of his bungalow during a thunderstorm, Richard meets two American surfers who have heard rumors of the island, including huge amounts of cannabis supposedly growing there. Before departing, Richard leaves them a copy of the map.