Max drops a courier package from a plane and it lands on the roof of a mansion. In an effort to retrieve the package, caught in the pouring rain, Max and 99 seek a temporary refuge from the elements and have to deal with the kooky inhabitants. The sadistic châtelaine, Mrs. Van Hooten (Gale Sondergaard), thinks 99 is her long-lost sister Rebecca, for whom 99 is indeed a doppelgänger. As a curiosity in the episode, Max is asked why he calls his wife "99", to which he responds that he does not know what her real name is.
