This time, Ernest Cunningham finds himself aboard the luxurious train Gun, which crosses the Australian desert from Darwin to Adelaide. After the publication of the novel, he was invited to become the guest of honour at a discussion of mystery writers. Ernest and his girlfriend Juliette board the train and find themselves among the creative elite. Suddenly, a murder occurs. Instantly, everyone becomes a suspect. Ernest is one of them. "Seven writers get on a train. At the end of the journey, five will get off alive. One will be in handcuffs