- 2 hr 16 min
A young couple move to New York City to live in an old apartment building, while Guy(John Cassavates) looks for work. Rosemary(Mia Farrow) is a innocent young housewife. The Castevets are elderly neighbors who seem to be innocent enough. Rosemary meets Terry, who lives with the Castevets. Rosemary notices her pendant, and wonders about the strange smell it has. Terry informs her the smell is from a root. The young couple comes home one night to find Terry has fallen to her death. Minnie invites Guy and Rosemary to dinner. Guy is instantly drawn to the Castevets, but Rosemary is not so sure. The pendant worn by Terry is given to Rosemary as a good luck charm. Guy soon gets a job acting in a play. With a definite income they plan to have a baby. Minnie shows up the night they plan to conceive a baby. She brings them a chocolate dessert in little cups. Later, Rosemary falls ill, and passes out. She has a dream that she is raped by a demon in front of her husband, and all the other tenants. Rosemary awakens to scratches all over her body. The baby is conceived, and Dr. Sapirstein(Ralph Bellamy) is the obstetrician that the Castevets push Rosemary into using as her doctor. He prescribes a drink that Minnie produces daily for Rosemary. An old friend comes to visit and notices Rosemary looks ill. She tells him about the drink that she consumes daily. Worried, he decides to do some research. Before he can tell Rosemary what he discovers, he dies. He leaves behind a book on witchcraft that is given to Rosemary at his funeral. While at a party Rosemary reads the book. The book secretly unveils that the residents of the apartments are Satan worshipers. Rosemary turns to Dr. Hill for help. He in turn calls Guy and Dr. Sapirstein, because he thinks she is delusional. They chase Rosemary through the apartment building and she goes into labor. When she wakes up they tell her the baby died. Rosemary later finds a secret door to the Castevet apartment. She enters a room to find a baby surrounded by the Satan worshipers. Looking at the child she knows is hers, she is terrified by his eyes, and deformed features. They tell her Guy is not the father but that Satan is. She resigns to be his mother with a little smile on her face.