On-call substitute doctor Shugo suddenly finds himself faced with a terrifying criminal in a clown mask. The assailant demands that Shugo treat injured high school student Hitomi. The perpetrator sets siege to the building and Shugo finds himself confined with 64 unknown patients.
FINE Entertainment, Warner Bros. Japan, Tristone Entertainment, Jitsugyo no Nihon Sha, Aeon Entertainment, KDDI, Nippan Group Holdings, Nippon Broadcasting System, LINE, Lawson Entertainment, Hikari TV