In the aftermath of a horrific car accident that kills her husband, Michael, expectant mother Madeline Matheson finds that her daughter, Grace, has died at the uterus. Ignoring the warnings of her doctor that the embryo has to be removed from her own body, a grief stricken Matheson demands to hold the child to term when it threatens her life to do so. Curiously Grace emerges un dead -- with a craving for human blood.