Ikebukuro has a problem with stabbings. In Ikebukuro, Tokyo, the awkward and the incompetent in love gather. A high school girl is worried about her situation. A third-rate journalist covers the Ikebukuro area. A professor who is suspected of committing sexual harassment. A thug who wears a yellow bandana and is known for his toughness. A young man dealing with sensitive information. And a headless rider on a black motorcycle. As these individuals and many others get caught up in a whirlpool of unfortunate incidents, Ikebukuro begins to crumble...!