At the riflery club, Jannis runs into his former schoolmate Marvin, who is hiding from a gang. The two accidentally mix up their backpacks. At the office Christmas party, Jannis finds Marvin‘s pistol. He tries to hide it, unnoticed – above all, he doesn’t want his ex-girlfriend, who is at the party, to see it. But then Marvin shows up at the office and wants his gun back..