It’s 1998. QuakeCon, the gaming competition of the year, is coming up. Two young Swedish girls are practicing hard when their dad tells them that if they don’t go and visit their grandmother, there’ll be no more games. Their grandmother needs some company – at the nursing home, there’s nothing to do other than snooze and wait for afternoon brandy. When the girls drag themselves to see their bored old granny, she gets them to play a new game: 'Killing Grandma'.