The city is Manhattan. On a chilly fall night, Cathy McCain's childhood nightmare returns, and this time, she is old enough to know they are real. The mysterious appearance and disappearance of her pregnancies are frightening. She keeps night vigils to foil her abduction by the alien beings from another dimension, who takes her against her will. She is powerless against them, and her efforts yield nothing. To avert a mental case title, she keeps her experience a secret and struggles daily to live a normal life, but when the aliens abducts her newly born baby, she takes the offensive and determines to put an end to her family abductions.