Shen Yu, the commander of the Jinyi Guards known as the "Living King of Hell", met Su Qingyan, a cold female doctor whose identity is a mystery, while investigating a major case of collaborating with the enemy. He thought she was a pawn in the case, but he didn't expect that she was the only antidote to the ten-year cold poison in his heart. An embroidered spring knife cuts off all injustices in the world; a tender heart and blood are just to protect her for the rest of her life.
