The islanders have been marooned for ten days on their deserted island with barely anything to eat. Faced with starvation, one of the group wants to leave. Rob leads the desperate search for food, but their attempts to fish and hunt come to nothing and they find themselves taking increasingly terrifying risks. Rob bravely leads a group of the strongest swimmers into the sea to set a fishing net in the perilous deep water, but they quickly get into trouble. Most of the swimmers make it back to shore, but the men and women are left in crisis when they realise Rob is nowhere to be seen.

Following Patrick's horrifying fall, the Island is in crisis. Dr Dan's expedition party is now trapped in a tiny cove, with a tropical storm on the way. When the safety team arrive to evacuate Patrick, they find the stormy sea too rough to land their boat. The only escape route is a perilous climb back up the cliffs. Back at camp, the need for food is more urgent than ever. So far the men have dominated the hunting, with little success and Elliot desperate for a big kill. But barmaid Tilly yearns to get more involved.