Former Prime Minister Katsumi Atago (Akigo Yamada), who was hospitalized at the Der Spiegel Medical University Hospital for examination, died suddenly!The pathologist at the same hospital, Tatsumi Fujimaki (Takashi Sorimachi), dissected Atago's body in order to investigate the cause of death.At this moment, inspection technician Kurume Hoki (Haru) said that he might have been killed.

It is said that before Atago's death, he had a quarrel with his lover Anri Azuma (Kana Kurashina) about the surviving family members. The two suspected that Anri had killed Atago, and there was a quarrel in the hospital.

After carefully examining the body, Fujimaki noticed a mysterious black spot remaining on the right side of his neck.From the extracted liquid specimen, “ unknown cocci” were found! And what’s incredible is that the cocci suddenly disappeared 1 hour after collection...!!

Not to mention the people in the hospital, it may soon endanger human lives around the world. It is “murderous cocci”.Fujimaki feared that the worst would happen, so he secretly obtained the permission of Chairman Okuno Shinji (Bando Yajuro) and started collecting new liquid samples.

At this moment, a new patient died suspiciously in the hospital! Was it someone who deliberately injected cocci to cause serial killings? So who is the real murderer? Fujimaki, who was in a desperate situation, took an incredible action%...!