In the year 1598, Kim Damryeong stayed at Mr. Yang's house. At the little pond, he met the mermaid's eyes. Damryeong felt sorry for the mermaid, so he sent the mermaid to the sea under the guise of Mr. Yang's crime. Hence, their long relationship started.
EP2 MeetNov 17, 2016
Heo Joonjae becomes soft-hearted after seeing the mermaid waiting for him, so he brings the mermaid to his house. The mermaid is addicted to the new world of Joonjae's laptop. Meanwhile, Joonjae and the mermaid become fugitive due to the chase of Jang Jinok.
EP3 Find AgainNov 23, 2016
Joonjae was left alone with a jade bracelet and a grain of pearl after falling from a cliff, he barely managed to arrive in Seoul and hurried in to resolve a fraud case of madam. Meanwhile, the mermaid begins a rough journey to Seoul to keep the promise.
EP4 PremonitionNov 24, 2016
Joonjae, who had never seen a mermaid before felt a strange sense of vision and helped her escape from the aquarium... On the other hand, a murder happened next door to Joonjae while the whereabouts of Ma Daeyoung is unknown for three months.
EP5 ReduplicateNov 30, 2016
Joonjae feels strange about himself having weird feelings toward Shim Cheong. He warns Cheong that if she does not tell him what happened in Spain by tomorrow, she should leave home. Cheong falls asleep with a wish that the next day would not come.
EP6 JealousyDec 01, 2016
Joonjae falls in a panic state after seeing Cheong is bedridden at hospital emergency room. Heo Chihyeon receives investigation at the hospital. Meanwhile, Jo Namdoo finds a tape recorder that is attached to a black box inside of Chairman Heo Giljoong's car.
EP7 Jealousy for LoveDec 07, 2016
Having lost some memory, Joonjae is confused, Hong Dongpyo encounters Ma Daeyoung.
EP8 SincereDec 08, 2016
Cheong is annoyed by Yoo Jeonghoon's advice; Joonjae feels strange about Namdoo's loss of communication.
EP9 RevealDec 14, 2016
Joonjae is relieved to know that Cheong is with him; Joonjae discovers that the man who threatened him was an escaped prisoner.
EP10 AltruismDec 15, 2016
Joonjae is troubled by Damryeong's identity; Joonjae and Namdoo receive an invitation from Ahn Jinjoo.
EP11 HurtDec 21, 2016
Cheong finds out that Joonjae is a swindler; Joonjae focuses on finding Cheong; Dongpyo finds out about Daeyoung's past.
EP12 SweetDec 22, 2016
Jinjoo decides to meet with Kang Seohee again; Joonjae is caught by Dongpyo.
EP13 Episode 13Dec 28, 2016
Cha Shia and Mo Yooran visit Joonjae's house; Joonjae discovers something strange.
EP14 Episode 14Jan 04, 2017
With the help of Professor Jin, Joonjae finds out that he is on the same path as his previous life, so he decides to protect Cheong.
EP15 Episode 15Jan 05, 2017
After learning about Cheong's terminally ill heart, Joonjae cannot conceal his sadness.
EP16 Episode 16Jan 11, 2017
Joonjae and Yooran have a talk; Namdoo questions Yooran; Chihyeon asks Seohee about his biological father.
EP17 Episode 17Jan 12, 2017
When Cheong sees the end of her previous life with Joonjae, she becomes confused.
EP18 Episode 18Jan 18, 2017
After Chairman Heo's death, Joonjae and Dongpyo speed up their investigation; Chihyeon approaches Namdoo.
EP19 Episode 19Jan 19, 2017
Joonjae suffers from unexpected circumstances; Daeyoung visits Professor Jin in an attempt to regain his memory.
EP20 FinalJan 25, 2017
Before returning to the sea, Cheong says farewell to people; Joonjae does some embarrassing acts.