A scientist fights to save his daughter when she is chosen as one of the eight million human beings who are kept hostage by an alien species in order to save their planet.

Police lieutenant detective Thomas 'Thom' Randall's steady girl-friend, Dr. Jennifer 'Jen' Allen, is Dr. Aaron Michaels's main assistant on his pharmaceutical firm Bellion's research program to cure the highly contagious, fatal infection Guinin. A convicted murderer, whom Thom arrested, is one of their special drug test subjects, but escapes. The convict and Jen are affected by radioactively altered DNA from an experimental reactor used on mosquitoes which transfer quinine. The convict soon mutates into a mosquito-like monster, which sucks its victims dry. By the time Thom and his junior murder brigade partner Charlie Morrison figure out what happens, Jen starts mutating herself.

An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.

A young Jewish girl, Sara, is looking to escape the clutches of the Third Reich after seeing her parents and sister brutally slain by a smuggler who betrayed them while attempting to escape to England. Terrified, she is sheltered by her childhood friend Jean, a homosexual in a clandestine relationship with his lover Philippe.