Iris and Hailey attend a party given by former colleague Lydia Nolan, where drunken Charlotte Williams loudly announces her intention to leave her dull husband Howard. Six hours later Charlotte is found dead. Detective Bryce believes it was a hit and run but Iris suspects foul play and the four code-breakers query why Charlotte was on foot so far from home. Investigations lead them to a country club near to where the body was found and the victim's married lover, James Crawford, whilst Howard tells Iris that Charlotte was a compulsive thief, stealing jewels from her friends, including Crawford's neurotic wife Patricia. Howard is arrested but the quartet are sure that he is innocent.
—don @ minifie-1