探偵社で起こった人質立て籠もり事件解決の為、急遽通りすがりの新聞配達に扮した中島敦。太宰に背中を押され、爆弾と人質を盾に立て籠もる犯人に立ち向かうが――

Nakajima Atsushi, pretending to be a newspaper delivery boy in order to thwart a suicide bomber at the detective agency. Thrown into the deep end by Dazai, he approaches the bomber and the hostage…