Looking to earn some extra money because her car is always having problems, widowed mom Jane takes on a job as wedding consultant to Livvy Thatcher, a young businesswoman. Jane then enlists her best friend and neighbor, Shelley Nowack, to help her. The wedding is to be held at an old family hunting lodge that was once a monastery, and it proves to be a somewhat spooky venue for the nuptials. After Jane and Shelley arrive at the lodge, the eccentric cast of characters (and eventual murder suspects) begins to gather: a mysterious, laconic caretaker whom Livvy calls "Uncle Joe"; Mrs. Crossthwait, a cranky, elderly seamstress; three bridesmaids; a caterer; and a florist named Larkspur, not to mention Livvy's elderly aunts. Add the bride and her father, an arrogant captain of industry, and the groom, his mother and brother, and the stage is well set for shenanigans. Larkspur tells Jane the story of a hidden family treasure, and later it is Larkspur who discovers Mrs. Crossthwait dead at the foot of the stairs. Did she fall, or was she pushed? To find out, Jane enlists the aid of her lover, Chicago cop Mel Van Dyne, who comes along to help the local police