The film tells the story of the complex situation on the border of Country K. Police officer Song Shao’s comrade is seriously injured and unconscious while trying to save him. Song Shao’s wife is also implicated in the organization’s mission and killed. To protect his only daughter, Song Shao retires and hides his identity, while secretly searching for his enemies to seek revenge. Finally, during a kidnapping case involving his daughter, the enemy’s whereabouts are revealed, and Song Shao engages in a bloody battle with the enemy.
