After an earthquake destroyed Xiang Qin's house, she and her father moved in with the family of her father's college buddy, Uncle Ah Li. To her surprise, the kind and amicable aunt and uncle are the parents of her cold and distant schoolmate Jiang Zhi Shu, a genius with an IQ of 200 whom not too long ago rejected her endless crush on him. Will the close proximity give her a second chance to win Zhi Shu's heart? Or, will her love for him end under his cold words? What happens when there is competition for his heart?

Xiao Mi’s boyfriend dies in an accident. His heart was transplanted into another young man, Yi Tang Yao. So Xiao Mi transfer to his school and try to get close to him . From doing his homework, to running 10,000m…Finally Tang Yao accepted Xiao Mi as his girlfriend. But one day, Xiao Mi discovered that her late boyfriend’s heart was not transplanted into Yang Tao at all….and Yang Tao finally discover the truth of why Xiao Mi want to get close to him…

Because of one photo, Jia Dian Na encounters Huang Yao Qiang. She believes that Huang Yao Qiang is her fated one and thus, begins the plan to capture her husband. She plans multiple coincidences, making him believe it's fate. They end up getting married but soon Huang Yao Qiang finds out that she planned their meetings and feels betrayed. Unable to face all the grief, Jia Dian Na proposes a divorce and they go their separate ways. When Huang Yao Qiang finds out she has a new boyfriend, he realizes that Jia Dian Na has already left her shadow in all his memories. Therefore, he decides to chase his ex-wife back.

The series takes place a year after the 2nd installment.

Chan Siu Sang is single and all alone, his old love Chu So Ngo married the doctor that treated her son and left the police force. Then he meets Wai Ying Zi, a rookie police officer that is under Chan Sam Yuen Police Traffic Department unit. The two get off on the wrong foot due to misunderstandings. Wai Ying Zi who is eager to show off her skills seems to get into a lot of trouble. She is deemed reckless and rash. Later on, Ying Zi joins Siu Sang's CID unit which leads to the two bickering non-stop. After Siu Sang saves Ying Zi life on one of their investigations she learns to respect him and the two become friends. Chan Sam Yuen is promoted to the head of the Police Traffic Department. She and Ching Fung are also now parents to a pair of girl/boy twins, but their marriage is not as happy as it seems as the two continue to have quarrels in their marriage. With marital problems at home, Sam Yuen becomes a cold, unreasonable and mean boss at work. When a case similar to the psychotic serial rapist in the last series arises Sam Yuen starts feeling threaten and insecure even though the culprit Bao Gwok Ping is still locked up in jail. It seems Bao Gwok Ping has been communicating with someone on the outside who agreed to take on his split personality persona and continuing his crime spree. Due to Sam Yuen's carelessness her son is kidnapped and killed by the new culprit. This causes Sam Yuen and Ching Fung marriage to be in further jeopardy when he blames her for the death of their son.

Ben, an emergency room doctor, and Tandawan have been in love for 15 years. Tandawan, who owns magical power, starts to doubt whether Ben still loves her. One day, they met a traffic accident and Tandawan is seriously injured. When she wakes up, she loses all her memories.

Recovery doctor Charam appears in her life and she has the same feeling she once had for Ben. During this time, Ben also meets a new girl, Bami, who has a crush on Ben and pretends as an ambulance driver to get closer to him.