Aging gambler Benny Walsh dies in a suspicious car crash after the biggest poker win of his life. His son, Clyde, comes to the Nevada town in search of answers. He discovers that each of his father's gambling buddies had ample reason to see him dead.

Two "Normal" teenagers - they cut classes, get into fights and are never far from their Walkman headsets - notice a sudden change in their fellow students. No one is able to explain this zombie-like behavior which, at the command of an unseen alien, makes them punish transgressors with merciless violence.