A man, who once dreamed of becoming a punk rocker, is working as a low salaryman at a musical instrument parts company. He's secretly in love with his colleague. One day, he finds a little turtle on the rooftop, naming it Pikadon.

After participating to a previous show where they have to bet or be challenged to any kind of competitions, the losing members of the Gaki no Tsukai are selected to spend 24 hours in a setting which they have no knowledge of the theme nor the course of the events. They are exposed to various absurd and crazy situations nonstop for 24 hours and must refrain from laughing. If they do so, hang-men appear and hit the rule breakers with a weapon (the weapon varies every year).