Hakutaka Shirataka Amane no Investigation File

A corpse of a clown is found in a park Detective Shirataka Amane of Musashino Higashi Police Station begins investigating with rookie detective Uzuka Shinsaku They find a picture of the victim holding a balloon with the number 1 and the letters TTX on social media which indicates pufferfish poisoning Shirataka intuitively suspects that this is an incriminating statement done by a serial killer but Chief Investigator Fukukawa Saeko denies her Detective Kusano Seiya and other personnel of MPD First Investigative Division join the investigation then a second murder occurs Shirataka recalls an unsolved kidnapping and murder case from two years ago that she still regrets