Local demolition derby driver Jimmy Walker learns that his girlfriend is pregnant. Somehow, the two of them manage to accidentally open a mysterious portal, unleashing a horde of bio-engineered alien creatures on their small town. Now, in a race against time, these soon-to-be parents must work together to stop the monster invasion - or their town, their planet, and their relationship could face sudden annihilation. Turns out, it's going to be a long day in Alien Country.