Ejected from the orphanage that has been his home, a despairing boy with no prospects in life named Atsushi Nakajima rescues a peculiar man from a suicide attempt - Osamu Dazai. It turns out that Dazai is part of an armed-detective agency staffed by individuals whose supernatural powers take on a literary bent! When Nakajima is engaged by Dazai and his associate Kunikida to hunt down a man-eating tiger terrorizing the region, little does Nakajima suspect that the encounter will transform his life forever!