横沟正史的最高杰作，在诸多推理小说排行榜中占据第一宝座的《狱门岛》再次被搬上屏幕！！　　以战争刚刚结束的濑户内海的孤岛为舞台，毛骨悚然的氛围加之精妙的杀人诡计——长谷川博己所饰演的金田一耕助与过去英雄式的演绎不同，性情古怪、有时装傻充愣，心中却隐藏着战争带来的创伤，为了填补内心的空虚而忘我地投身于案件之中。“初春忽至、黄莺倒悬枝头、初啼声声”，封闭的孤岛上展开的连环杀人案，不知为何被比作俳句的杀人之谜，新的金田一耕助将如何破解！？

Shortly after the end of the war, Kindaichi Kōsuke, visiting a remote island in the Seto Inland Sea, arrives at the powerful Kitō family on the island guided by the monk Ryouzen. There, Kindaichi encounters a beautiful woman named Sanae and encounters three sisters with unconventional and outlandish appearances that don't quite fit the island's atmosphere. And then, one evening, the youngest sister disappears... Kindaichi Kōsuke is rebooted into action!