A meeting of a mystery society results in murder.

Nancy's sister Gloria comes to visit, much to her dismay. With a history of stealing boyfriends, Nancy isn't happy when Gloria takes a shine to Howard.

Amy believes that Richie is having an affair with Ginger, and is not so sure whether to tell Jan just days before her birthday party.

Jan's high school reunion is at the restaurant, where she runs into her old boyfriend Jack.

The girls, Sonny, Nancy, Howard and Howard's date all find themselves at the same singles bar after work. High jinks ensue.

The staff find themselves trapped on the roof, while Amy, Nancy and Howard must deal with an unruly crowd at the restaurant.