Wang Man Ting, a Police Coast Guard (PCG) Team Leader, is a tough officer who protects our country’s coastal safety with the Special Task Squadron (STS). Le Xiao Tian, CEO of an electronics company is arranging the illegal movement of migrants. To divert police attention from his plan, he orders Guo Tai, the owner of a fish farm, to send someone to kill his enemy Lucas.

Guo Tai knocked Popiah abruptly in order to escape and Popiah was ready to shoot him. However, knowing that Guo Tai's life is in danger, Inspector Feng Ze was unable to pull the trigger. Witnessing this, Man Ting shot Popiah and he died. Feng Ze could not get over the fact that he was not able to open fire under such critical situation. Shi Tong, supervisor as well as Man Ting's father explains that what happened to Ya Qi was not his fault.

In a class gathering, Man Ting met Jess who just came back from abroad. Jess's speech towards Man Ting was filled with sarcasm as she has never liked Man Ting all along. Jess is the Vaccine Research and Development Expert and when her classmates prompted her on her new findings, she refused to reveal anything. Quy Vuong contacted Guo Tai asking them to meet with Jess for a deal and to kill her once it is completed.

Jess met with Man Ting and while Man Ting was on the phone, Jess placed a USB containing the vaccine program into Man Ting's bag, and purposely created an argument by bringing up long-standing problems and left. Thereafter, Jess was found dead in Pulau Ubin. Man Ting, being the last to see her, became the suspect. Jess约曼婷见面，并趁着曼婷听电话的当儿，将疫苗程序的USB塞进她包包的暗格里，并故意与曼婷翻旧账，大吵一架后拂袖而去。过后Jess被发现吊死在乌敏岛的树林里，曾经来找过Jess的曼婷成为嫌疑犯。

In order to track down the USB, Guo Tai asked her adopted daughter, Ke Xin to search Jess's grandfather's apartment by posing as Jess's classmate. However, nothing was found. After Xiao Tian and Guo Tai learnt of Jess and Man Ting's argument, they suspected that the USB lies with Man Ting. They tasked Jia Ming to court her in order to find the USB....... 为了寻找USB的下落，国泰的养女可心假扮是Jess的同学，去慰问Jess的阿公，乘机搜索阿公家，一无所获。

While looking through the CCTV footage in search for Jess’ murderer, Ze Feng spots a man with a tattoo on one arm acting suspiciously. When Jia Hao delivers fish to Xiao Ying, Ze Feng sees a similar tattoo on Jia Hao’s arm and thus arrests him. However, Jia Hao is released as he has an alibi. 峰泽寻找杀害Jess的凶手，从码头的监控画面发现一手臂有纹身的男子，行迹可疑。家豪送鱼货给晓英，被峰泽看见。峰泽见他手臂上的纹身与监视器中可疑男子的纹身很相似，将他带回警局问话。家豪有不在场证据，峰泽只好将他释放。

Man Ting realizes that Yun Yun is missing after receiving a call from Ah Ping. While searching for Yun Yun with Jia Ming, Man Ting has an anxiety attack when Yun Yun’s disappearance reminded her of her own traumatic experience. Seeing Man Ting in such a state for the first time, Jia Ming comforts her by embracing her. 曼婷接到阿萍的电话，得知其女芸芸失踪，急忙和家明赶去事发地点寻找。由于芸芸失踪的情景与曼婷当年被诱拐的情景很相似，曼婷被勾起可怕往事，顿时惊慌失措。家明第一次看到曼婷慌乱的样子，忍不住将她拥入怀里。

Man Ting and Jia Ming coincidentally return to the same park where they were abducted from to look for clues. They hear a child’s cry and search for the source of the sound. Seeing a man with a little girl, Man Ting misunderstands the man for abducting the girl and rushes to stop him. Witnessing Man Ting’s reaction, Jia Ming confirms that she is the girl who was abducted with him when they were little.

Man Ting and Jia Ming lie in ambush at a nearby store. When the pervert appears, both of them attempt to catch him. Man Ting lets him slip away when she panics after he throws raw chicken at her. Both of them contact Shi Tong while chasing after the pervert. They chase him all the way to Lim Chu Kang but only manage to witness him escaping in a speedboat with Yun Yun.

Jia Ming attempts to help Man Ting overcome her fear of chickens by showing her different chicken cartoons, letting her play with toy chickens and even dressing up as a life-size chicken himself. However, when Man Ting sees the life-size chicken, she freaks out and attacks the chicken, only to realize that it is Jia Ming in disguise. Man Ting is grateful for Jia Ming’s sweet gesture, thus increasing their feelings for each other.

An assassination occurs during a press conference on the collaboration between Lucas and the Prince of the Middle East and chaos ensues. The culprit manages to escape despite Man Ting’s pursuit. The Prince’s doctor, Dr Johnson, is shot and sent to the hospital. A car accident occurs en route and the wounded Dr Johnson alights from the ambulance and leaves… Lucas与中东王子合作计划发布会，突然遭枪手袭击，场面混乱。曼婷追截凶徒，但仍被对方逃出新加坡水域。王子的医生Dr Johnson受枪伤，被送去医院。。。

Jia Ming finds a USB inside Man Ting’s bag but she claims that it does not belong to her. Jia Ming brings the encrypted USB home and unlocks it. He passes the USB to Xiao Tian when he realises it is Jess’ vaccine formula. Now all that is left to be found is the poison gas formula. Jia Hao uses Dr Johnson’s family to threaten him into revealing the formula. He relents and gives in.

Dr Johnson’s corpse was discovered. According to initial analysis, his death was caused by asphyxia, and his body was subsequently thrown into the sea. Ze Feng, with his strong analytical skills, firmly believes that Dr Johnson’s murderer is Jia Hao. The news on Jia Hao being a wanted man is on television. Mei Zhen, knowing that Jia Ming is Jia Hao’s brother, opposes to Man Ting and Jia Ming’s relationship.

Guo Tai passes Xiao Tian the virus which Jia Ming has made. Meanwhile, Ruby gets cheated of her money by Louis. She asks Xiao Tian, whom she is having an affair with, to teach Louis a lesson. Xiao Tian asks Ke Xin to complete this task. Ke Xin disguises herself as one of the victims, Han Fei. Ke Xin gathers all the victims, including Mei Zhen, to discuss on how they can teach Louis a lesson.

Louis was discovered dead when his skull was found. While investigating the case, Ze Feng and Shi Tong discover that Mei Zhen is involved. Mei Zhen reveals the plan to teach Louis a lesson but she is clueless as to how Louis had died as she was unconscious. On the other hand, Ruby and Angie testify that Mei Zhen is the murderer. Louis被人杀死分尸，头颅被发现。世通和峰泽追查案件，查到美真居然涉案。美真录口供，说起和其他三女在游艇上要教训Louis的事，表示不知Louis是怎么死的，因为当时她也处于昏迷状态，但其他两女Ruby和Angie却指证她是凶手！

Man Ting finds an audio recording of the crime scene in Mei Zhen’s phone. Although there are no images, it is enough to prove Mei Zhen’s innocence. The recording shows the mysterious Han Fei spearheading the incident, proving Ze Feng’s suspicion that she is the mastermind. Upon hearing Han Fei’s voice, Man Ting finds it familiar……. 曼婷从美真的手机里发现一段案发现场的录音，虽然没有画面，但录音显示美真所做的口供是真的，得以无罪释放。录音显示神秘女子韩菲一直在主导事件的发展，就如峰泽之前所推测的那样，她才是主谋。曼婷感觉韩菲的声音有点熟悉……。

Xiao Tian arranges for Guo Tai to flee the country after he fails to rescue Jia Hao. PCG and STS intercept the speedboat and force the boatman to surrender. Aden leads a team onto the boat to capture the boatman and Guo Tai but discovers there is a bomb onboard. He pushes his team mates into the sea in time but dies with the boatman and Guo Tai when the bomb explodes. 国泰营救家豪失败，在笑天安排偷渡出国。海岸卫队和STS将快艇包围，Aden与船夫开战，最后船夫投降。。。

Xiao Tian and Ke Xin meet up with the virus buyer’s middleman, Si Tu, at sea to discuss about their deal. Man Ting, Si Min and the team are patrolling the sea, routinely checking the boats. Xiao Tian claims that he is discussing business with Si Tu and that Ke Xin is the one who introduced them to meet. Si Min and team conduct a thorough check and find nothing suspicious...

Jia Min overhears Xiao Tian’s conversation and discovers that he was indeed the one who placed the bomb on the boat in attempt to kill Guo Tai. He has also found someone to deal with Jia Hao. Jia Min and Ke Xin’s rage fuels them to start on a revenge plan towards Xiao Tian. They intend to trick Xiao Tian onto an island and kill him with a bomb using a drone. 家明监听笑天的卫星电话，果然从他和别人的对话中，证实他在船上放置炸弹，害死国泰，还要找人对付家豪。家明和可心悲愤交集，开始部署报仇计划，准备将笑天骗到外岛，，，

Alexis holds Ke Xin and the cargo ship boat hostage to threaten Jia Ming into using the virus to attack Singapore. Jia Ming complies and flies the drone towards Singapore. Man Ting, Xiao Rong and the others go onboard the ship and find something amiss. They are ambushed by Alexis and shocked to learn that the drone carrying the virus is on the way towards Singapore… Alexis挟持可心及骑劫货船，威胁家明用病毒对新加坡展开恐袭。货船上，家明超控无人机向新加坡飞去。曼婷、晓荣等上货船检查，发现异样。。。