In 1993, the Search for Extra Terrestrial Intelligence Project receives a transmission detailing an alien DNA structure, along with instructions on how to splice it with human DNA. The result is Sil, a sensual but deadly creature who can change from a beautiful woman to an armour-plated killing machine in the blink of an eye.

Jimmy "The Tulip" Tudeski now spends his days compulsively cleaning his house and perfecting his culinary skills with his wife, Jill, a purported assassin who has yet to pull off a clean hit. Suddenly, an uninvited and unwelcome connection to their past unexpectedly shows up on Jimmy and Jill's doorstep; it's Oz, and he's begging them to help him rescue his wife, Cynthia.

After a mobster agrees to cooperate with an FBI investigation in order to stay out of prison, he's relocated by the authorities to a life of suburban anonymity as part of a witness protection program. It's not long before a couple of his new neighbours figure out his true identity and come knocking to see if he'd be up for one more hit—suburban style.

Having just returned from a mission to Mars, Commander Ross isn't exactly himself. He's slowly becoming a terrifying alien entity with one goal -- to procreate with human women! When countless women suffer gruesome deaths after bearing half-alien offspring, scientist Laura Baker and hired assassin Press Lennox use Eve, a more tempered alien clone, to find Ross and his brood. Before long Eve escapes to mate with Ross.

After she delivers her child in an ambulance, alien Eve is killed by a half-breed. Fortunately, Dr. Abbot scoops up the baby alien and escapes. In time, the baby grows into a gorgeous blonde named Sara and begins her quest to find a worthy mate. But Sara is also savage and leaves a trail of deaths in her wake. This carnage makes chemistry student Dean question whether to help her race or not.

As a corporate auditor who works in a number of different offices, Jonathan McQuarry wanders without an anchor among New York's power brokers. A chance meeting with charismatic lawyer Wyatt Bose leads to Jonathan's introduction to The List, an underground sex club. Jonathan begins an affair with a woman known only as S, who introduces Jonathan to a world of treachery and murder.