A man is robbed and murdered by two Thai assassins. Zhijie and Lantian manage to solve the case but Zhijie feels this is not a simple case of robbery-cum-murder due to the insignificant amount of the valuables stolen. Lantian feels otherwise. 泰国杀手假冒警察，杀死汤杰夫，抢走保险箱内的现款和珠宝。特别罪案调查组的芷婕与调去专门罪案处的蓝天联手侦破此案。由于失窃款项不多，芷婕觉得这不像是单纯的劫杀案，蓝天认为她太多疑……。

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. 芷婕外出购物，被人跟踪，上厕所时还差点被人袭击，却浑然不知。跟踪她的人是一年前干下连环凶杀案，后来中了枪掉进海里、找不到尸体的通缉犯陈彦均。彦均坠海后毁容，心怀愤恨，所以回来找机会向芷婕报复。

The Police Intelligence Department obtains information on Yan Juns illegal entry into the country. Yaojia and Zhijie think that he may appear at his mothers funeral. 情报组搜集有关彦均可能偷渡的资料，耀佳和芷婕都认为彦均可能会出现在母亲的葬礼上。SIS组员分散在殡仪馆附近观察，芷婕发现彦均的哥哥彦理用手机拍摄葬礼过程，怀疑他发送给彦均，马上去查接收的地点……。

Lantians friend, Zhongzheng, is suspected of engaging in illegal prostitution and is brought back to the police station for questioning. 蓝天的朋友忠正涉嫌非法嫖妓，被带回警局盘问。忠正矢口否认，说他是到酒廊找女儿，而该名雏妓就是他失散多年的女儿红夕。但红夕却否认自己是忠正的女儿，并一口咬定她跟忠正发生了性关系。

Yanjun escapes into a forest with Zhiejie and Xiaoyang hot on his heels. 芷婕和晓洋追捕彦均，彦均逃入树林。芷婕随后追赶，吩咐晓洋待在原地，并通知总部。但晓洋发现彦均的踪影，心急地要抓他，谁知却中了彦均的圈套，让他有机可乘，打晕芷婕，并用芷婕的枪威胁晓洋，顺利将芷婕带走。

Zhijie manages to escape but suspects herself of being raped by Yanjun. 芷婕脱困，但怀疑自己可能被彦均奸污，想要告诉蓝天，却说不出口。她上网查询，知道一般娈童癖者难以跟成年异性发生正常性关系，于是自我安慰，还把彦均发给她的电邮和照片删除，决定把这段不愉快的事情给抹去。

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. 女佣Wati被发现死在组屋天台的水箱里，验尸官验出她已经怀孕，所以是一尸两命。蜘蛛明曾恫言要将Wati砍死，因此成了嫌疑犯，被芷婕扣押拘留。他否认自己杀死Wati，在被盘问时提到儿子贵祥是警察，晓洋感到很意外。

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. 蓝天从私家侦探处证实自己的亲生母亲就是罗露露，是个酒廊老板娘。蓝天来到吊花场，被前来找露露的忠正发现，忠正及时提醒露露蓝天是警察的身份。蓝天目睹露露风尘味十足的样子，无法接受。露露不知蓝天的目的，两人各怀心思。

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. 心怡收到志恒从美国寄来的网球拍，见球拍上有偶像张德培的签名，兴奋不已。耀佳约心怡出去，心怡提议去打网球。球场上，耀佳见心怡紧紧握着志恒赠送的球拍，心里感到不是滋味。打球时心怡忽然出现幻觉……。

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. 选美见贵祥这两天脾气暴躁，追问下得知他和晓洋之间出现问题，劝他与晓洋和好。贵祥因一再迁就晓洋，很多事情都是按照她想要的去做，达不到她的要求，她就不高兴，两人经常吵架，贵祥终决定跟晓洋分手。

While researching for leads in the dismembered corpse case, Zhijie discovers that Zhizhis frequent point of contact is Jinhong. Jinhong becomes a prime suspect when his DNA matches the samples found at Zhizhis home. 芷婕调查碎尸案，得知与芝芝联络最频密的是锦荣。由于锦荣的DNA与在芝芝家发现到的相同，于是将锦荣列为嫌疑犯。过后她却查出锦荣有一个双胞胎弟弟叫锦华，也认识芝芝。芷婕担心两兄弟的DNA会一样，倍感棘手。

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 Lantians joy. She is less enthusiastic as she suspects the baby is Yanjuns as Lantian is diagnosed as possibly being sterile. 蓝天和芷婕一起吃早餐，芷婕一闻到鸡蛋的味道就想吐，蓝天怀疑她怀孕，要她去做检查。检查结果发现芷婕果然怀孕，蓝天兴奋不已，芷婕却忐忑难安，怀疑孩子是彦均的，因为医生曾说过蓝天可能不育……。

Zhongzheng overhears Jimmy being hounded by loansharks over the phone. Upon hearing Jimmy needing money for his sons illness, Zhongzheng writes him a cheque. He learns that Lantians team has been investigating into a case of fake credit cards. Jimmy接到大耳窿的追债电话，正好被忠正听见。忠正得知Jimmy因为儿子生病，经济有困难，当下就给了他一张支票以解燃眉之急，Jimmy感激不已。忠正套话，获悉蓝天这一组人正在调查假信用卡案。

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. 选美向璐璐预支薪水，露露表示不能坏了规矩，选美无奈。忠正得知，即刻拿出支票帮助她。两人谈起，选美才知道自己长得像忠正的初恋女友，自己能够唱歌，也是忠正向露露推荐的，选美更对忠正留下好印象。

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. 蓝天和芷婕到骨灰塔拜祭蓝天生父魏富青，巧遇前来拜祭芝芝的露露和选美。选美上前寒暄，问蓝天前来拜祭谁，蓝天回说前来祭拜生父。蓝天离去后，露露赫然发现他的生父就是魏富青，恍然蓝天就是自己的亲生儿子，震惊不已。

Spider Ming forgets to pick Guifa from the tuition centre after playing mah-jong throughout the night before. 蜘蛛明因为打通宵麻将，忘了到补习中心接贵发。清晨，贵祥在巡逻时发现某处有发生车祸的痕迹和血迹，却找不到车子和伤者。正感奇怪间，他突然看见贵发的新水壶，怀疑贵发被车撞，急忙打电话回家，发现贵发不在家……。

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. 贵祥四处寻找贵发不果，累得不成人形，选美心疼地安慰他。贵祥在车祸现场看到蜘蛛明在路边派寻人启事传单，愤怒责骂蜘蛛明，两人大吵。蜘蛛明愤而刮了贵祥一巴掌，父子裂痕加深。

Xinyi and Xiaoyang discover the identity of the foreign worker hit by Yonglun. 心怡、晓洋查到被咏伦撞死的劳工身份。贞婷从心怡口中知道被撞死的劳工命运坎坷，内疚自责不已。咏伦上心怡家接贞婷，心怡无意中发现咏伦穿的运动鞋跟弃尸现场的鞋印吻合，愈加怀疑咏伦等人跟离奇车祸案有关。

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. 贞婷受重伤，怡父伤心欲绝，迁怒于耀佳。心怡成功逮捕司机石毅元，石毅元却撇清和车上乘客丁友朋的关系。大家猜测丁友朋才是提供毒品的人，背后可能是一个很大的贩毒集团。贵祥透露曾看到忠正和丁友朋在一起。

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 Zhentings father. Unable to face Yaojia over Zhengtings demise, Xinyi decides to break off with him. 贞婷伤重身亡，心怡父和继母带着她的骨灰要回美国，耀佳赶来送贞婷最后一程。心怡父对耀佳仍不能谅解。心怡也无法释怀，面对耀佳，却一再地想起贞婷，终于决定跟耀佳分手。

Zhongzheng gives a sum of money to Jimmy for his daughters operation on the condition that he provides classified information on the police operations. Jimmy agrees to the deal for the sake of his daughters operation. Xinyi witnesses Zhongzheng giving the cheque to Jimmy. 忠正知道Jimmy的女儿东桦病情恶化，需要再动手术，于是给了Jimmy一笔钱付手术费，但要Jimmy当内应，随时把警方的行动通报给他知道。Jimmy为了女儿的病，只好答应。忠正和Jimmy见面给支票的一幕，正好被心怡看到。

Lantian plans an operation to arrest Kaiwen at his hotel. 蓝天到酒店逮捕欺诈案的凯文，忠正接到Jimmy通风报信，及时让凯文逃走，但凯文一出酒店就被蜘蛛明挟持。蜘蛛明气恨凯文骗了他的钱，两人在车上发生争执，导致车祸。心怡介入调查，找到蜘蛛明挟持凯文的货车，却发现凯文已经被杀。

Zhijie discovers someone with a pair of shoes matching the show prints found at the crime scene visited Kaiwen at the hotel on the same day. 芷婕从酒店大堂CCTV中，发现当天有人去找过凯文，此人穿着一双符合案发现场鞋印的鞋子。蓝天发现那双鞋子与他在逮捕露露那天，被人打晕前所看到的鞋子是一样的，惊讶原来两起案件有关联。他从中联想到忠正，怀疑忠正欺骗他。

Zhongzheng is arrested and he denies all allegations against him. He maintains that he only gave the money to Jimmy for his daughters operation out of sympathy. 忠正被逮捕，否认贿赂Jimmy一事，说他只是同情Jimmy，出钱帮他女儿医病而已，也否认与凯文的欺诈案有关。由于没有足够证据，芷婕和耀佳一时拿他没办法，只好把他放了。蓝天语重心长地劝忠正自首，否则自己一定会亲手逮捕他。