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Season 1
The Legend of the Blue Sea
20 EPISODES • 2016
How can a mermaid from the Joseon era survive in modern society? Shim Cheong is a mermaid who follows her one true love, a nobleman’s son named Kim Damryeong from the Joseon Dynasty, to modern-day Seoul. Damryeong’s modern doppelgänger is Heo Joonjae, a highly skilled scam artist who first becomes interested in Cheong because of a jade bracelet worth $6 million that Cheong wears. With nowhere to go, Cheong is taken in by Joonjae, who also finds his con partners, Jo Namdoo and Taeo, hiding out in his home from a vengeful past victim of their scams. Cheong discovers a rival for Joonjae’s heart in Cha Shia, a researcher at KAIST who deals with ancient artifacts. When a dangerous killer named Ma Daeyoung, sent by Joonjae’s stepmother who wants to make her own son the heir to Joonjae’s fortunes, can Cheong survive her strange new environment while also helping Joonjae avoid the dangers that await him?

Episodes

1: Destiny
Nov 16, 2016
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.
2: Meet
Nov 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.
3: Find Again
Nov 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.
4: Premonition
Nov 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.
5: Reduplicate
Nov 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.
6: Jealousy
Dec 1, 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.
7: Jealousy for Love
Dec 7, 2016
Having lost some memory, Joonjae is confused, Hong Dongpyo encounters Ma Daeyoung.
8: Sincere
Dec 8, 2016
Cheong is annoyed by Yoo Jeonghoon's advice; Joonjae feels strange about Namdoo's loss of communication.
9: Reveal
Dec 14, 2016
Joonjae is relieved to know that Cheong is with him; Joonjae discovers that the man who threatened him was an escaped prisoner.
10: Altruism
Dec 15, 2016
Joonjae is troubled by Damryeong's identity; Joonjae and Namdoo receive an invitation from Ahn Jinjoo.
11: Hurt
Dec 21, 2016
Cheong finds out that Joonjae is a swindler; Joonjae focuses on finding Cheong; Dongpyo finds out about Daeyoung's past.
12: Sweet
Dec 22, 2016
Jinjoo decides to meet with Kang Seohee again; Joonjae is caught by Dongpyo.
13: Episode 13
Dec 28, 2016
Cha Shia and Mo Yooran visit Joonjae's house; Joonjae discovers something strange.
14: Episode 14
Jan 4, 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.
15: Episode 15
Jan 5, 2017
After learning about Cheong's terminally ill heart, Joonjae cannot conceal his sadness.
16: Episode 16
Jan 11, 2017
Joonjae and Yooran have a talk; Namdoo questions Yooran; Chihyeon asks Seohee about his biological father.
17: Episode 17
Jan 12, 2017
When Cheong sees the end of her previous life with Joonjae, she becomes confused.
18: Episode 18
Jan 18, 2017
After Chairman Heo's death, Joonjae and Dongpyo speed up their investigation; Chihyeon approaches Namdoo.
19: Episode 19
Jan 19, 2017
Joonjae suffers from unexpected circumstances; Daeyoung visits Professor Jin in an attempt to regain his memory.
20: Final
Jan 25, 2017
Before returning to the sea, Cheong says farewell to people; Joonjae does some embarrassing acts.
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