Experiment Perilous

In 1903, Dr. Huntington Bailey is returning by train to New York during a heavy rainfall. The afraid middle-aged woman Clarissa "Cissy" Bedereaux asks to seat next to him and tells that she is going to visit her younger brother Nicholas "Nick" Bederaux that she raised and his gorgeous wife Allida Bederaux. However, she does not want to stay with them and asks Dr. Bailey the name of a hotel, and he suggests the hotel where her lives. He sends her luggage to his hotel but learns that Cissy died while having tea with her with Nick. Dr. Bailey asks the hotel manager to send her luggage to Nick. His friend, the artist "Clag" Claghorn invites Bailey to have tea with Nick and Allida, and Bailey meets the couple. Soon he finds Cissy's journals since his valise has been mistakenly exchanged with Cissy's one and learns that the middle-aged Nick is jealous of Allida. He observes that Nick keeps her prisoner at home and drives her to the edge of insanity, and is capable to kill his rivals, such as Alexander "Alec" Gregory or who interferes with the couple, like Cissy. The worst, Bailey falls in love with Allida.