New C-Drama: Deep Lurk

During the war, the enemy activates a spy named "Black Butler" who has been hidden in China for 15 years in order to win the battle. Yun Muzhi is killed during the investigation of "Black Butler". His son, Yun Hongshen pursues the murderer and falls into the trap set by "Black Butler" long ago. When Yun Hongshen is at a loss, his father's friend gives him great help and protection, and he finally sees through the opponent's plot.