Autumn 1939, Liuhe Town Stronghold. Second Lieutenant Lin Fangyang of the puppet army switches between three identities every day: a submissive lackey in the eyes of the Japanese army, a smiling tiger in the mouth of his fellow traitors, and a lurker secretly unavailable. The information was stuffed into a dead mailbox for three months, and no one came to pick it up. Internal factions wanted his life, so Yamamoto Ichiro put a gun to the back of his head and asked. The danger intuition suddenly screamed - just three words: don't look back. He turned around with a smile and punched the attacker's throat bone. Kill people with borrowed knives, frame dissension, and turn the stronghold into a pot of porridge. But when the Japanese forced him to execute the underground traffic officer himself, the hand holding the gun began to tremble. Alone among the wolves, he had no reinforcements. The only weapon is that the enemy can never guess his next face.