On the day he was falsely accused of rebellion, Shen Jin opened the underground palace in front of everyone, and a hundred thousand armors appeared with a bang, making the court tremble. Jiang Zhao, who had fought side by side in a bloody battle, faced off with his sword. Xiao Yuheng, the supervisory censor, held irrefutable evidence but was speechless. Mu Xuanji, the deaf-mute guard, pointed out the murderer with blood drawings. A chess game that has been planned for ten years to restore the country opens with a bloody curtain amidst the roar of iron armor - who is behind the scenes? Who is guarding in secret? And is Shen Jin a traitor or a savior?