"National Security Strike" - A Step-by-step, Heart-stopping Counter-espionage Battle

The beautiful girl Zi Ye discovers her boyfriend Wei Ling's treasonous actions and kindly advises him, only to be killed. Wei Ling then seduces Zi Ye's younger sister Zi Xiao in an attempt to find the source of his exposure. National security agents take advantage of his fear, letting Zi Xiao pretend to be her deceased sister Zi Ye, starting a thrilling psychological game with the spy organization. Wei Ling undergoes plastic surgery and goes into hiding at North University, but Zi Ye's "phantom" continues to follow him, eventually driving him to the brink and causing him to change his appearance multiple times. The security bureau and detective captain Lei Fang closely cooperate in investigating Zi Ye's murder, forcing the spy organization to make mistakes repeatedly as they try to cover up their tracks. Ultimately, the security agency uncovers the long-hidden senior spy, "Blue Plum Blossom."