"Finally settled into their new home after losing their house in a fire, and fully established in their new shared offices, private investigator Sharon McCone and her business partner husband Hy are starting to feel comfortable. That calm is shattered when Hy's former colleague Gage Renshaw--a shady troublemaker who they had presumed dead reappears, and it's unclear what he wants from his prosperous former associate. Meanwhile, Sharon has a new client...

Groucho's business schemes bring Milan's finest opera stars to New York, but Harpo and Chico stow away and arrive too and nearly create a riot on ship and a scandal in New York.