Customs Frontline

In the bustling streets of Hong Kong, Customs and Excise Department officers Chow Ching-lai and Cheung Wan-nam have a unique bond that goes beyond just colleagues. They share a mentor-student relationship that has been cultivated over years of working side by side.

When a case involving seized smuggled arms comes to light, Ching-lai is chosen to participate in a high-stakes joint operation with Interpol to apprehend a notorious arms dealer. The pressure is on as they race against time to prevent a potential disaster.

However, just when things seem to be falling into place, Wan-nam shocks everyone with a bold and unexpected move that throws a wrench into their carefully laid plans. As the situation becomes increasingly complex, their loyalty and trust in each other will be put to the ultimate test.