Sarah is the third generation of the half-man. half-alien being. She is almost a perfect specimen, which was revived by a renegade Abbot, professor of biochemistry. Cruel in her search of a partner for reproduction, Sarah has an amazing physical strength and ability to transform her body into various aggressive forms, to throw tentacles and claws. Sarah soon discovers that she is being persecuted by other two individuals with the same DNA as hers - Emilia and Joseph. Sarah returns to the laboratory of the Professor, where he asks his young lab assistant and student to protect her future offspring - the eggs. Pursuing Sarah, the deadly Emilia, as well as Sarah, wants to leave offspring, but her body is being destroyed very quickly...