Kokurojo -

• Mystery
• Drama
• History

Araki Murashige (Motoki) rebels against the tyrannical methods of Oda Nobunaga and launches a siege. The castle is surrounded by Oda forces, leaving him isolated and helpless. While keeping the hotheaded retainers in check, Murashige struggles to protect the castle and its people with the emotional support of his wife, Chiyoho (Yoshitaka Yuriko). One day, a young boy is murdered within the castle. After that, a series of mysterious incidents occur. The suspect is a retainer or family member inside the castle, which has become a locked room. Outside the castle are enemy forces. Inside the castle are traitors. As everyone becomes increasingly suspicious, Murashige attempts to solve the mystery with the help of Kuroda Kanbei (Suda), a dangerous and brilliant military strategist imprisoned in prison. What is the shocking truth behind the incident?