Mermaid Got Married is the Splash-like tale of a beautiful mermaid who loses her pearl when she saves high school teacher Dior Cheng from drowning. It turns out she also saved him when they were both kids so there's an immediate connection between the two. Unfortunately, the pearl is the source of her power so she follows him onto land.
Hua Xiao Xuan is a witch of a supernatural flower shop called "The Memory Garden," where she helps her customers let go of their fixation and move on with their lives. One day, she meets the man who accidentally stole her sense of smell during her 13th regeneration years ago. The sense makes him immune to her powers and allows him to enter her shop without invitation. She foresees their lives intertwine and the darkness she is fighting against may cause his death someday.
The fate of these people become twisted due to "hwanhonsool" (the soul of the dead return to the living). In the country of Daeho, Jang Wook comes from the noble Jang family. He holds an unpleasant secret about his birth, which people all around the country talk about. He's a troublemaker. Jang Wook happens to meet Mu Deok. She is an elite warrior, but her soul is trapped in a physically weak body. She becomes Jang Wook’s servant, but she also secretly teaches him how to fight. Seo Yool comes from the noble Seo family. He seems perfect with good appearance, intelligence, and strong martial arts skills. Go Won is the crown prince of Daeho. He hopes to become a generous king