The Invisibles

In the city, some crazy female eatery customer kills people for no apparent reason. EUIP Kiu Po-po comes to intervene, but she gets hurt. Meanwhile, CTRU runs into an insane guy.

Ka-keung rushes to the scene just in time and saves Po-po.

Yiu-yeung feels bothered as he recalls he once hurt Tai-nam. Siu-jie always likes Yiu-yeung and comes forward to console him.

According to POTT CSP Fong Kwok-hei's analysis, the perpetrators in the floating corpse case are a group of hunters.

Po-po receives a report and is shocked to see Ka-ka's dead father, who committed suicide. She cannot hide her sadness.

Yiu-yeung turns up just in time and defeats the hunters.

ACP Kong Chi-kin wants CTRU to collaborate with POTT.

POTT and CTRU jointly launch an investigation.

The kidnappers want to get even by killing Hiu-yuet. Ka-keung turns up and intervenes.

Po-po and Tai-nam are forced to move out.

POTT receives intelligence that overseas terrorists Ba Yik and Ma Lui are coming to Hong Kong.

The gun-wielding terrorists take people hostage at Fook Lui Mall and block mall entrances and exits.

Ka-keung prepares for the SP promotion exam. But his promotion is affected as the mall hostage incident is negatively covered by the media.

Hiu-ming comes clean with Yiu-yeung about the reasons behind his deteriorating relationship with his daughter.

Chi-yiu is missing. Hiu-ming still feels uneasy after lodging a report.

Ying Fung and Siu-jie take the girls on a combative run.

Yiu-yeung nervously rushes to the explosion scene.

Some bomb is planted on Sparky, and it is taken to the city center to be detonated.

The explosion suspect and their accomplices plant bombs at various spots in the hospital.

Both Po-po and Tai-nam apply for leave.

Po-po is moved as she realizes Yiu-yeung has kept a music box containing the memories of the two of them.

Tai-nam comes forward to console Siu-jie as he knows Siu-jie is lovelorn.

A man is found dead in a hotel room.

CTRU team members get worried as they just cannot contact Tai-lik.

After getting kissed by Ying Fung, Ka-keung astonishingly pushes her away.

Ka-keung and Ying Fung sweetly hold hands while romantically taking a stroll.

Tai-nam is guided by some sound and finds Siu-jie's location.

Yiu-yeung and his subordinates rush to the pier.

Kwok-hei rebuilds morale by encouraging the chums to cheer up.