A woman stands to inherit a fortune if she can get all her brothers and sisters in one place...which is far more complicated than it might sound. When the Tatlocks, a very wealthy couple, suddenly and unexpectedly die, the executor of the estate informs Nan Tatlock (Wanda Hendrix) that their will stipulates that all members of the immediate family must be present at the reading in order for it to be valid. Nan immediately smells trouble, as the Tatlocks are a notoriously eccentric group of people, and as the sole "normal" member of the family, she's generally the only one who can be counted upon to arrive on schedule. As it turns out, Nan's greatest problem is rounding up her brother Skylar, who is so dizzy that he requires a full-time caregiver, Denno (Barry Fitzgerald). However, Skylar got away from Denno during a trip to Hawaii, and no one is sure where he is -- or even if he's still alive. When Nan learns that she could inherit several million dollars if she can bring her relatives together, and Skylar stubbornly refuses to materialize, the caretaker hires Burke (John Lund), a Hollywood stuntman who bears a striking resemblance to the missing man, to pose as Skylar at the reading of the will. Miss Tatlock's Millions was the first film directed by veteran British comic actor Richard Haydn, who appears in a small role under the pseudonym "Richard Rancyd." Ray Milland and noted director Mitchell Leisen also make cameo appearances.