Explosive City

Yung arrives in Hong Kong to attend an international conference and speaks to reporters at the airport. A mysterious woman, Jade, emerges from the crowd and fires three shots, throwing the terminal into chaos as security forces react. The attack reveals the scale of the threat and sets the police on high alert.

During the pursuit, Jade tumbles from a building, and the fall leaves her with memory gaps. Cheung's squad presses the chase through crowded streets and service corridors. The sudden amnesia adds a layer of uncertainty to the operation.

Following the attack, the Hong Kong police intensify their investigation and bring in Tim Yiu to assist Chief Inspector Cheung. The incident shakes the city and exposes vulnerabilities in airport security. The team begins to assemble clues pointing to Jade and the organization behind the plot.

Investigators reveal Jade was born in Japan and abducted at age three by the terrorist leader Otosan. She was brainwashed and trained to be an elite assassin. This backstory explains her calm efficiency and the complex strands of loyalty that will surface later.

Otosan secretly moves his organization into Hong Kong, signaling a broader plan to confront authorities. He remains hidden while orchestrating actions from the shadows. This escalation marks the threat's expansion beyond the airport.

Under Otosan's command, his operatives murder Yiu's wife Monica and kidnap his son Joe as leverage to force Yiu to kill Jade. The city becomes a web of threats that blur lines between duty and family. The blackmail raises the stakes for the investigation and Yiu's choices.

Yiu is forced to carry out Otosan's command and shoots Jade as she is being escorted by his CID team. He then hijacks Jade to gain control, the confrontation unfolding while she wears a bulletproof vest. The act pushes him from protector to a wanted suspect.

The shooting and hijacking turn Yiu into a target for law enforcement. Authorities search for him while trying to understand the motive behind the orders he followed. His status worsens the investigation and complicates the effort to resolve the case.

With time running out, Yiu pursues Otosan to rescue his kidnapped son. Jade offers information but remains unreliable due to her memory loss. The pursuit threads through the city as both sides race to reach Otosan first.

Jade's memories return and she recalls critical details about Otosan's operation. She reveals that Otosan planted a mole inside the police force named Cheung. The revelation shifts the investigation toward internal betrayal and a more tangled web of loyalties.

Yiu and Jade discuss why Cheung did not carry out the assassination, noting that Jade was the chosen target. The mystery points to deeper scheming and possible complicity within the force. The question remains open as investigators reassess the chain of command.

With the mole exposed and Jade memory clarified, the hunt for Otosan intensifies. Yiu and Jade prepare for the next move against the terrorist organization, while the police grapple with the breach of loyalty inside their ranks. The stage is set for a climactic confrontation that tests trust and duty.