When easy-going Aoyagi meets an old friend for a fishing trip, he ends up drugged, framed for the Prime Minister's assassination, and on the run from corrupt cops. It's only the beginning of what quickly becomes the worst, weirdest day of his life. But he'll get by with a little help from his friends, who include a famous pop diva, a rockabilly deliveryman, a crippled old gangster, and the world's most cheerful serial killer.

Set in an alternate universe, the ancient capital of Kamakura is a vibrant town where fantastical creatures live alongside humans. Akiko is a cheerful publishing assistant who moves into town after marrying Masakazu, a popular mystery writer. Akiko is surprised by the unusual town but enjoys the new curiosities surrounding her. However, just as she was beginning to settle in, a trifling incident sweeps her spirit to the underworld too soon. Convinced that destiny has something else in store for his wife, Masakazu journeys into the underworld to bring back Akiko’s spirit.