You sort of expect Horizon, the science fiction porn movie written and directed by Sam Hain, to be a spoof or a tongue-in-cheek parody. But the (totally work-safe) trailer shows, they're playing this absolutely straight.

(Although some people may giggle a bit at the bargain basement CG and a bit of the acting in the trailer, especially when the hawt captain wonders if she's making the right decisions.)

The aliens have wiped out most of the human race, and it's up to a team of porn stars to save the entire planet. Can they rise to the challenge? Will they come to our rescue? Here's the synopsis:

The action in Horizon takes place in the year 2085, after a civilization of extraterrestrial origin has invaded Earth. About one-third of the planet's 9 billion inhabitants have been killed; nearly 2 billion more have been evacuated to a military base hidden in the core of the planet Mercury.

Of the 4 billion humans who remain on Earth, all are expected to perish within 48 hours. Taking a last stand against the alien onslaught, one Marine battalion remains on the surface. But they are in retreat, seeking shelter in the space cruiser Horizon.

In addition to the Wicked Girls, the denizens of the year 2085 include AVN Best Actress winner Kimberly Kane, Bobbi Starr, Misty Stone, Aiden Starr, Rocco Reed, Bill Bailey, Tony De Sergio, Xander Corvus and Danny Mountain.

[via AVN]