Gabriel and his two friends clash with Nelson and his two companions as they share the same train compartment on the London to Brighton train. However, they are all confronted later on by two Muslim suicide bombers who threaten to blow up the train. Each passenger in the carriage has a memory which is triggered and which surfaces as events unfold. Gabriel is paralysed with self-doubt, he and his fellow passengers must overcome their personal demons and take action against the bombers in the ensuing terrifying climax.