A curious investigation is one entrusted to the O Agency. It is a question of finding the man who disguised himself as a grandmother to reach the Old Ladies Club, where he was registered under the name of Mme Sacramento, widow of the former President of Panama. A cheque for one thousand dollars was paid as a provision by Margaret Pitchard, a billionairess of Austrian origin, host of this club. A difficult job for Emile...

Mrs. Sacramento dines with Mrs. Pitchard. As she leaves, Mrs. Sacramento's car refuses to start and Mrs. Pitchard invites her friend to stay and sleep in her home. The next morning, Mrs. Pitchard wants to greet Mrs. Sacramento but she hides her face while claiming that she is ill. But suddenly, Mrs. Pitchard discovers that Mrs. Sacramento has a beard ...