C.L.I.F.

Guixiang is on patrol when he meets two suspicious-looking police officers. When he questions them, they draw their guns. They are, in fact, Thai assassins posing as police officers. Yaojia and Jinshan rush to the scene. Qingwa trips and blacks out. In a condominium unit, Tang Jiefu is killed. Zhijie suspects the killers were the fake police officers. She finds it strange that the two men seem to have killed Jiefu for a small amount of money and jewellery. Zhijie conducts a search of Qingwa’s house and finds he had bought two sets of police uniforms. Qingwa comes round and claims the two Thai men had wanted to rob Jiefu. Lantian, who is now with the Specialised Crime Division, delivers evidence to Zhijie. Cigarette butts found in the motel room indicate that one of the suspects is a heavy smoker.

Zhijie nearly gets attacked while shopping. Her stalker is none other than Chen Yanjun who had previously committed many murders and believed to be dead. Disfigured and vengeful, he returns to seek revenge on Zhijie.

The Police Intelligence Department obtains information on Yan Jun’s illegal entry into the country. Yaojia and Zhijie think that he may appear at his mother’s funeral. Special Investigation Section officers lay in ambush near the funeral parlour where Zhijie discovers Yanjun’s brother, Yanli, using his mobile phone to film the funeral procession. She suspects him of sending the clip to Yanjun and rushes to find out the recipient’s location.

Lantian’s friend, Zhongzheng, is suspected of engaging in illegal prostitution and is brought back to the police station for questioning. Zhongzheng denies the claim and defends himself by stating that the prostitute he was visiting is his long-lost daughter Hongxi. Hongxi refutes Zhongzheng’s claims by declaring that she is not his daughter and that they had sexual intercourse.

Yanjun escapes into a forest with Zhijie and Xiaoyang hot on his heels. Zhijie orders Xiaoyang to stay put and inform the HQ, but her impatience in capturing Yanjun causes her to fall into his trap instead. Yanjun knocks Zhijie unconscious and threatens Xiaoyang at gunpoint, taking Zhijie with him.

Zhijie manages to escape but suspects herself of being raped by Yanjun. She wishes to tell Lantian but is unable to do so. She learns from the Internet that most pedophiles are unable to have normal sexual intercourse with adults and thus consoles herself with that thought. She deletes the emails and photos Yanjun sent her and decides to put this unhappy incident behind her.

Wati, a domestic helper, is discovered dead in a water tank at the rooftop of a HDB block. The coroner discovers she was pregnant at the time of her death. Spider Ming (Wang Yuqing) becomes the prime suspect of this vicious crime as he had previously threatened to kill Wati and is arrested by Zhijie. He denies killing Wati and mentions that Guixiang is her son, surprising Xiaoyang.

Lantian learns from a private investigation company that his birth mother is Luo Lulu, the owner of a pub. Lantian visits the pub and gets discovered by Zhongzheng who happens to be visiting Lulu. Zhongzheng manages to warn Lulu of Lantian’s identity as a policeman in the nick of time. Lantian is unable accept Lulu’s flamboyant ways while Lulu is skeptical of Lantian’s real motives.

Xinyi is ecstatic to receive a tennis racquet autographed by her idol from Zhiheng and suggests playing tennis when Yaojia asks her out. Yaojia has a bitter taste in his mouth when he sees Xinyi treating her racquet gifted by Zhiheng with much care. However, she sees someone...

Jelly advises Guixiang to reconcile with Xiaoyang when she discovers them having problems in their relationship. Guixiang decides to break up with Xiaoyang as he is unable to meet her expectations.

While researching for leads in the dismembered corpse case, Zhijie discovers that Zhizhi’s frequent point of contact is Jinhong. Jinhong becomes a prime suspect when his DNA matches the samples found at Zhizhi’s home. She subsequently discovers Jinhong has a twin brother Jinhua and it turns out that he knows Zhizhi as well. Zhijie is worried the case will turn complicated should both brothers have the same DNA.

Lantian suspects Zhijie is pregnant when she is nauseous upon coming in contact with eggs and asks her to go for a medical checkup. Zhijie is pronounced as pregnant much to Lantian’s joy. She is less enthusiastic as she suspects the baby is Yanjun’s as Lantian is diagnosed as possibly being sterile.

Zhongzheng overhears Jimmy being hounded by loansharks over the phone. Upon hearing Jimmy needing money for his son’s illness, Zhongzheng writes him a cheque. He learns that Lantian’s team has been investigating into a case of fake credit cards.

Jelly asks for a salary advancement from Lulu but her request is denied. Zhongzheng immediately writes her a cheque to help her out. He leaves a good impression on her when she learns that she looks like his first love and that he was the one who recommended her to Lulu.

Lantian and Zhijie bump into Lulu and Jelly at the columbarium. Lantian tells Jelly he was visiting his father when she quizzes him. After Lantian leaves, Lulu is shocked to discover that Wei Fuqing is his father, which makes Lantian her son.

Spider Ming forgets to pick Guifa from the tuition centre after playing mahjong throughout the night before. Guixiang discovers evidence of a car accident while on patrol but is unable to find the car and victims. He spots Guifa’s brand new water bottle and suspects he was hit and becomes even more worried when he is unable to contact Guifa at home.

A tired Guixiang searches for Guifa everywhere but to no avail and is comforted by Jelly. Guixiang sees Spider Ming distributing pamphlets to look for Guifa and chides him bitterly. Spider Ming slaps Guixiang, causing a further rift in their relationship.

Xinyi and Xiaoyang discover the identity of the foreign worker hit by Yonglun. Zhenting learns from Xinyi that the foreign worker led a life of hardship, causing her to feel even more remorseful. Xinyi discovers Yonglun’s shoe print matches the print found near the abandoned corpse and suspects Yonglun and gang has something to do with the accident.

Zhenting sustains serious injuries from her fall. Her parents lash out at Yaojia for accidentally causing her fall. Xinyi manages to nab Shi Yiyuan but he denies his relationship with Ding Youpeng. Everyone suspects Ding Youpeng to be a drug trafficker for a big drug ring.

Zhenting dies of her injuries. Her aggrieved parents decide to take her ashes back to the United States. Yaojia arrives to pay his last respects only to be chided by Zhenting’s father. Unable to face Yaojia over Zhengting’s demise, Xinyi decides to break off with him.

Zhongzheng gives a sum of money to Jimmy for his daughter’s operation on the condition that he provides classified information on the police operations. Jimmy agrees to the deal for the sake of his daughter’s operation. Xinyi witnesses Zhongzheng giving the cheque to Jimmy.

Lantian plans an operation to arrest Kaiwen at his hotel. Jimmy warns Zhongzheng of the operation and Kaiwen manages to leave the hotel in the nick of time. However, he is accosted by Spider Ming outside the hotel. Spider Ming drags him to his van and the pair struggles, causing an accident. Xinyi manages to recover the van but discovers that Kaiwen is dead.

Zhijie discovers someone with a pair of shoes matching the shoe prints found at the crime scene visiting Kaiwen at the hotel on the same day. Lantian recognizes the same pair of shoes he saw before he was knocked unconscious on the day he tried to arrest Lulu. He is alarmed that both cases may be connected and starts to suspect Zhongzheng.

Zhongzheng is arrested and he denies all allegations against him. He maintains that he only gave the money to Jimmy for his daughter’s operation out of sympathy. Zhijie and Yaojia release him due to the lack of evidence. Lantian warns Zhongzheng that he will arrest him personally if he is ever found to be guilty.

Lantian trails Zhongzheng to the warehouse and a gunfight ensues. Lantian loses his gun in the process but manages to snatch the evidence from Zhongzheng and advises him to surrender. Just when Zhongzheng contemplates on doing so, Dehai appears and attacks Lantian. Meanwhile, Yaojia and Xinyi assume they will die in the freezer. They bare their feelings to each other, before Yaojia passes out...