Liu Shishi

In the late Ming Dynasty, three sworn brothers who serve as the imperial secret police are dispatched to hunt down Wei Zhongxian, a eunuch politician who had been forced to resign from his influential post and exiled from Beijing. The brothers return successfully from their quest, only to find that their task was but the beginning of a strange conspiracy.

When a series of eerie murders erupts across Hong Kong, grizzled veteran Huang and his reckless younger partner Wang, are assigned to track down the killer.

After a critical intelligence leak, a national security unit launches an intensive investigation. But successive setbacks in their arrest operations reveal a shocking truth: the trail leads back to within the unit itself. Amidst a storm of trust and betrayal, a silent battle begins to unfold...