Around August 23, 1989, siblings Barbara and Johnny visit their mother's grave in a remote Pennsylvania cemetery. During their visit, an elderly man who is in shock and has blood on his forehead, bumps into them and flees in terror. They offer to help him, but they are attacked by a zombie. Johnny is killed while Barbara flees the cemetery and discovers what appears to be an abandoned farmhouse. She seeks shelter there, only to find another pack of zombies. Shortly after, a man named Ben arrives after fleeing from a local diner that was attacked by zombies, and the two clear the house of the dead and begin the process of barricading the doors and windows.
