Crew of an undersea mining platform falls prey to mysterious and dangerous parasite. The parasite has the ability to affect people's minds, so survivors can't be certain who is safe and who is infected.

Still in the thrall of the evil vampire Radu, Michelle yearns to be taught the skills of the vampire. Meanwhile, her sister Becky tries to free her from his evil clutches, and this time, she's brought some help.

A deaf man working at his father's high tech chemical engineering firm witnesses criminals fleeing from the firm's headquarters just after they've stolen an ultra-valuable experimental migraine cure. A female security officer is assigned to protect him, and as she does, the two fall for each other.

After a drug deal gone wrong, a group of punks flee to a secluded mansion where the house itself begins to terrorize and kill the trespassers.

Continuing after the first "Subspecies", a woman who has just become a vampire tries to escape the evil vampire, Radu, who seeks her as his love interest. But she has taken the vampire family's bloodstone, and now Radu must find her to get it back. While her sister comes to Romania to save her soul. It might be too late....