Undercover in Taiwan

As the Kuomintang government retreats to Taiwan, Yu Zecheng and Mu Wanqiu pose as husband and wife and infiltrate the heart of the enemy camp, in a perilous climate of factional infighting and mutual suspicion within the intelligence and security apparatus. With exceptional intelligence and unyielding resolve, they exploit divisions within the enemy’s ranks, walking a knife’s edge to accomplish one impossible mission after another. In the end, they help Yu Zecheng rise to the highest decision-making body in Taiwan’s intelligence and security System, turning him into a “strategic sword” aimed straight at the enemy’s heart.