On a mission to find food and water, Harriet and Douglas discover a dinghy capable of ferrying just two people. The duo selfishly conspire to leave the island and return for the others later. In an attempt to pacify an emotionally distraught Susan however, Douglas reveals the secret escape plan promising her a place aboard the vessel. The dinghy double-crossing begins to spiral out of control, leaving Douglas in a state of turmoil and Brett paranoid that machinations are afoot.
The survivors are running out of the food they have managed to salvage from the crash, but Douglas comes to the rescue by hunting the island's native wildlife - a hawksbill turtle. Self-styled 'King of the Island' Brett and his trusty sidekick Arnab create team 'Branab' to stalk Harriet and find out what she's hiding in her secretive case, while Susan attempts to seduce Douglas with an inhaler and her knowledge of the 50 Shades of Grey trailer.
Using a telescopic lens on a salvaged camera, Douglas thinks he has found a nearby, inhabited island. His plan to build a raft shocks Brett, who cannot believe he wants to leave the paradise they have created. Meanwhile, Susan, having been spurned by Douglas, is manipulated by a vengeful Brett and a witch-hunt begins. Douglas now stands accused of sexual assault, conveniently scuppering any raft-building plans by having to stand trial. Arnab is recruited by Brett to help seal Douglas' fate, but is undeterred in his own plan to build a glider and finally beat Douglas to the other island.
Salvation beckons when Harrison and Swallow arrive on the island; a research team studying the extremely rare, indigenous Hawksbill turtles.
When a plane bound for Britain crashes at sea, the survivors are thrown together on a tropical island somewhere in the Pacific. How will they cope? Will they be rescued? And how will family man Douglas Jennings deal with sociopath air steward Brett Sullivan?