In a forest, a group of friends are participating in a Live action role-playing when their activities are brought to an end by abusive local police. Their friend Joe, a slacker and a fan of Heavy metal music, is dumped by his girlfriend Beth. Joe's friends Eric and Hung bring him unwillingly to a fantasy Live action role-playing event to cheer him up. Gamemaster Ronnie, who was once humiliated by Joe as a result of an embarrassing ''Dungeons & Dragons'' incident, demands that Eric cast an advanced regeneration spell to allow Joe into the game. Eric recites a random passage from a grimoire he ordered online to allow Joe into the game, and unknowingly summons a succubus which resembles Beth.