Kuroi Gashu: Kusa

Ichiro Numata is the chief editor of a publishing company. He suddenly falls unconscious and is hospitalized, but various cases takes place at the hospital.

Hospital Director Kenichiro Asashima and Chief Nurse Junko Amemiya goes missing. There are rumors that they were in a close relationship. Head of Drug Management, Yasuharu Horimura is found dead. Rumors were that he stalked Junko Amemiya. The investigation into his dead is carried out as a suicide case, but Detective Eiji Kirishima suspects foul play.

Ichiro Numata follows with his sharp eyes what transpires at the hospital and he also holds a secret.