Set in a fantasy world, the story begins with an animated sequence where the main character, Popful Mail, squares off with the criminal Nuts Cracker in a forest. Though defeated, Nuts Cracker's body manages to escape, as always, and Mail thus cannot claim any bounty. Frustrated once more, she off-putedly takes Nuts Cracker's head and wanders until she finds a town. In the town, she attempts to trade the head for cash, but fails. Instead, however, she learns of a new bounty and becomes reinvigorated when she spots a 2,000,000 gold reward poster for the wizard criminal, Muttonhead, near the store. With this, she embarks on her adventure.