Nine men and women, employees of Interplanetary Corporation, live and work on Mars. Their days aren't particularly interesting, much less exciting, until they are assaulted by a murderous band of strangers and a seemingly unstoppable alien creature. Do these attacks have anything to do with the Martian fossil recently uncovered by one of the employees? Will the rapidly increasing body count adversely affect Interplanetary's stock price? And can anyone survive long enough to fill out the inevitable paperwork?

In the sleepy town of Thorsby, Alabama, no one had a life. Then the dead showed up. Now instead of just killing time the people of Thorsby are killing each other, taking up arms as the zombies take to the streets, the barbecue joints and the strip bars. Soon spaceships are flying overhead, federal agents are patrolling the grounds and a few fearless individuals are joining forces to run like hell.