Inside Man.

After 1945, intelligence officer Shen Fang returns to the Kuomintang bureau to expose traitors, recover secret plans, and stop a deadly conspiracy. Haunted by past injuries and strained family ties, he and his brother Shen Lin must navigate a dangerous web of espionage and deception. As hidden plots come to light, the brothers fight to survive and outsmart their enemies, racing against time to secure victory.