Three stories from Shiratsuna Island: "Mikan no hana" Shiratsuna Island is the only remaining island city in Japan, but it is being merged with a city on the opposite shore. Housewife Misato Tomita lives on the island. "Umi no hoshi" Yōhei Hamasaki, who was born on Shiratsuna Island, lives in an apartment in the outskirts of Tokyo with his wife, Tomomi, and their son, Taichi. "Kumo no ito" P...

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,...