Cast & Crew
The Federie clan gathers after the head of the family, Richard Federie, has a stroke. Nurse Sarah Keate arrives at the deserted mansion to care for him and it is she who raises the alarm after his son Adolphe Federie is murdered. Policeman Lance O'Leary is placed in charge of the case. With Sarah's help, he discovers that everyone hated Adolphe, but O'Leary suspects granddaughter March Federie, even though in Sarah's opinion, she is clearly the one person who is above suspicion. The investigation reveals that Charles Federie has a twin brother who was disowned by their father. He was just released from prison, and March has kept his arrival at the house a secret. After Grondal, the butler, is killed, Sarah finds a secret passageway in the closet. O'Leary sets a trap for the murderer and catches lawyer Elihu Dimuck, who killed Adolphe over money. Now that the mystery is solved, O'Leary asks Sarah to marry him.