Tsung Ka Yuen is an excellent police officer whose team always seems to get assigned to the most interesting cases in all of HK. He works well with his police colleagues and is looked upon by everyone as the big brother. Ka Yuen is also very close to his dad, brother, and stepmom. Ka Yuen wife died from cancer and he hasn't dated anyone since. Later, Ka Yuen starts to like Pauline but before anything happens with her, he dates Siu Tong Choy, one of his colleagues. Because the crimes that Ka Yuen's team deals with are mostly murders, in comes the forensics unit! The intelligent and modern forensics examiner, Pauline Lip Bo Yin. Her beauty and brains can be a bit intimidating so she too has not had much luck at love. As with Ka Yuen, Pauline also has an interesting family history. Her father was a well-known bomb expert who died when she was quite young. Pauline has remained extremely close with her mother, sister, and niece.

During Republican times, the story features the Zhaotong Young River Knife with Xiao Heng leading the troop against the Yunnan Japanese.

Bao Zheng is a man who has solved multiple cases in Kaifeng and Yu Rou is a young woman wholeheartedly devoted to him. Liu E is the beloved concubine of the Song Emperor but she conspires with Zhang De Lin in a quest for more power.

On the day that Miao Zi Shou is born, Miao Zheng gets the responsibility of holding the water hose or being a “miao zi shou”; Because of an urgent duty call, Miao Zheng, who had accompanied his wife for 30 hours, misses the moment when Ah Shou is born; It is also because of this urgent call that the name of “Miao Zi Shou” is coincidentally given to the child. Due to the fact that the work of being a “miao zi shou” is not a role that the public is well acquainted with, Ah Shou has no idea that his name has such deep ties with firefighting. Until he accidentally participated in a fire fighting operation… Because of this feeling of honor and the coincidence of his name, he changed his original career plan… Miao Zheng sealed away all the past events in his life and has never spoken a word about his wife… Ah Shou, who becomes a firefighter, had no idea that his father used to be an outstanding firefighter in the fire team. Changing his career from being a veterinarian to a firefighter, Ah Shou’s blood flows with the same enthusiasm as his father and it is because of this that he would continuously discover the value and meaning of life in his firefighting work. It is also this work that leads him to the criminal that started the fire that caused the death of his mom!

Two women became widows on the same day, same hour. Ha Yoon-jeong becomes the matriarch of the family of her husband. Yoon-jeong supports them because she feels guilty about her husband's disappearance. Oh Dong-ja, Yoon-jeong's sister-in-law, has been living with Yoon-jeong's help as well. After the terrifying day of losing their husbands, the two women have been living as each other's good companions. However, now they become implacable enemies because of their children! What would happen if their daughters rival each other in love? What would happen if Yoon-jeong's husband, who everyone thought was dead, appears before them as the future father-in-law of Dong-ja's son? Could Yoon-jeong and Dong-ja's relation go back to the good old days?

Yamaguchi Rika works for a record company. She has the worst birthday of her life when she is cheated of her money by a former boyfriend. An older woman dressed in a leopard print dress suddenly appears in front of her with white smoke. This older woman identifies herself as Rika from 20 years into the future. She laments her untimely death, which was caused by losing her footing on a beer bottle at a pub. She has come from the future in order to make a fresh start in life. Together with her future self with a despairingly different style and appearance, Rika begins a big battle to start over again.

Legend has it a dolphin once helped to reunite a pair of tragic lovers. From then on, the well-adored animal became the guardian of love. At Dolphin Bay, a tale of love and myth continues. Two children Zeya and Xiao Pin Gai met at an orphanage. Seeing the latter was often bullied by the other kids, Zeya rose to the occasion to become her gallant protector. Alas, the young couple parted ways when the director of a big company Xu Ruogu arrived to bring his 'grandson' home. Zeya promised to come back for Xiao Pin Gai, but when he finally makes good his promise 20 years later, his childhood friend is nowhere to be found. Where the orphanage once stood is now a cluster of skyscrapers. At Dolphin Bay, Zeya meets a young woman Tianbian. Her strong and optimistic character draws him to her, and Tianbian is touched by all that Zeya does for her. Nonetheless, unbeknownst to Zeya, he is nothing more than a good friend to Tianbian. When Zeya decides to profess his love, he discovers Tianbian already has someone in her heart; and he can only remain a good friend. Zeya unwittingly finds out the Xiao Pin Gai he has been searching for is actually Tianbian! This realization cements Zeya's desire to forever protect Tianbian like a big brother. But in a twist of fate, Tianbian discovers the love she has always dreamt of lies right in Zeya. But this pair of childhood lovers finds an invisible wall separating them. A future of happily ever after appears to be within reach, but yet escapes their grasp.