Intelligence analyst Will Travers suffers a shocking tragedy when his father-in law and mentor, David Hadas, is killed in a train accident. Will believes that Hadas was murdered which leads him to clues in a mysterious conspiracy. While investigating, he gets promoted to team leader - the position previously held by David. Katherine Rumour questions the unexpected suicide of her billionaire husband, Tom, who killed himself after finding a four-leaf clover in his daily newspaper.