Offering only the finest amenities, the Titan 1C space-cruiser is considered the most luxurious star-liner ever built. Future spring-breakers on board are excited to be touring through space with some of the world's elite. A sudden meteor storm smashes into the hull, and a deadly biological alien life-form is let loose on the ship. Seeking a suitable host, the retrovirus successfully merges with some the passengers, transforming them into seemingly invincible predators with the touch of death.