Rosemary Woodhouse's life seemed perfect: she and her husband, Guy, had rented a wonderful, spacious apartment in an old building, where they met their charming neighbors, the elderly Castevet couple. After that, Guy's career suddenly took off, with numerous acting offers pouring in, but along with this came strange occurrences: the Castevets' adopted daughter throws herself out of a window, Guy's acting rival goes blind, and an old family friend, Hutch, suddenly falls into a coma. When her most cherished dream comes true – Rosemary discovers she is pregnant – she realizes with horror that these gifts of fate are not a fortunate turn of events at all, but a real satanic conspiracy. Now she has only one task: to save herself and her unborn child from the servants of the devil who dream of the Antichrist's reign...