This episode set to Beth Bailey finds herself being thrown straight into the thick of things with her first operation with Section D. She has to go undercover as an oil trader at a secret meeting of the country’s top oil dealers. After being given intelligence that Robert Westhouse is the subject of an assassination attempt, Beth has to make sure that nothing happens to him. The oil traders are attacked in a machine gun massacre before the meeting takes part and only Beth and a man named Jacob Chapman survive. Section D attempt to uncover who is responsible. As Ruth delves deep into the case she finds out about a link between one of her colleagues and the masked gunmen.