A high-ranking member of the Monarch Lodge - a secret society in Santa Barbara - is found dead. Henry was once a member himself, and Shawn, having followed him there, believes it was murder. Lassiter discreetly asks Shawn to go undercover, but his soon to be ex-father-in-law is the highest ranking member, and the main suspect. For Gus, the case is an opportunity to rack up some prestigious clients.