When a prominent lawyer is murdered, two close friends of the Harts are accused. Jennifer sets out to clear the wife while Jonathan attempts to absolve the husband.

The Harts are invited to the wedding of Jonathan's former girlfriend in Monte Carlo. She is being forced into a marriage to a power-hungry, ruthless, blackmailer. The Harts uncover the truth and help foil the wedding plans allowing Nikki to marry the man she really loves.

Jennifer is stalked by a psychotic stage manager who lurks in the wings as the Harts don top hats and tails to perform in a charity benefit in the Big Apple.