They say that one's home is one's castle, but when it comes to Wynter Castle, Merry would like it to belong to someone else. But until a buyer bites, she could use some extra dough, so she decides to take in renters. The idea pans out, and Merry's able to find a handful of tenants eager to live in a real castle. The only problem is that most of them are crumby, tea-swilling old biddies.
The Legion of Horrible Ladies, as Merry calls them, is led by the terribly nasty—and fabulously wealthy—Cleta Sanson. The abrasive Englishwoman keeps everyone whipped into a frenzy—until she meets an embarrassing end behind a locked door. Evidence reveals that Cleta was murdered, yet no one is privy to how the deed was done. Merry knows that she must quickly find the killer before another of her guests gets greased.