The Legend of the Blue Sea

Season 1

How can a mermaid from the Joseon era survive in modern society? Sim Chung is a mermaid who follows her one true love, a nobleman’s son named Kim Dam-Ryung from the Joseon Dynasty, to modern-day Seoul. Dam-Ryung’s modern doppelgänger is Heo Joon-Jae, a highly skilled scam artist who first becomes interested in Sim Chung because of a jade bracelet worth $6 million that Sim Chung wears. With nowhere to go, Sim Chung is taken in by Joon-Jae, who also finds his con partners, Jo Nam-Doo and Tae-O, hiding out in his home from a vengeful past victim of their scams. Sim Chung discovers a rival for Joon-Jae’s heart in Cha Si-A, a researcher at KAIST who deals with ancient artifacts. When a dangerous killer named Ma Dae-Young, sent by Joon-Jae’s stepmother who wants to make her own son the heir to Joon-Jae’s fortunes, can Sim Chung survive her strange new environment while also helping Joon-Jae avoid the dangers that await him?

Where to Watch Season 1

20 Episodes

Destiny
E1
DestinyIn 1958, the nobleman Dam-Ryung releases a mermaid back into the ocean. In present-day Seoul, the figure of conman Joon-Jae stands on the same spot.
Meet
E2
MeetJoon-Jae brings a beautiful woman back to his hotel, unaware that she's a mermaid. Jin-Ok realizes she's been scammed and sends men after Joon-Jae.
Find Again
E3
Find AgainJun Jae 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. Mermaid begins a rough journey to Seoul to keep the promise.
Premonition
E4
PremonitionJun Jae, 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 Jun Jae while the whereabouts of Ma Dae-young is unknown for 3 months.
Reduplicate
E5
ReduplicateJoon-Jae lives with the woman who he names Sim Chung. Fugitive Dae-Young has been on the run for 3 months when a murder occurs near Joon-Jae's house.
Jealousy
E6
JealousyJun Jae fall in a panic state after seeing Cheong is bedridden at hospital emergency room. Chi Hyeon receives investigation at the hospital. Nam Doo finds a listening device inside of Chairman Huh's car.
Jealousy for Love
E7
Jealousy for LoveHaving lost the memory of Cheong in Spain, Jun Jae is confused by himself. He is caring about the presence of other man that Cheong speaks of. Detective Hong who has been looking for clues of the murder case encounters Ma Dae Young.
Sincere
E8
SincereCheong feels annoyed by Jung Hoon's advice so she asks bold questions to Jun Jae. On the other hand, Jun Jae felt strange about Nam's loss of communication. He contacted Nam again and Ma Dae Young receives the call.
Reveal
E9
RevealJun Jae is relieved to know that Cheong is with him now and looks after him. Meanwhile, Jun Jae is confused when it is discovered that the man who threatened him was an escaped prisoner, Ma Dae Young.
Altruism
E10
AltruismIn a museum, Joon-Jae sees a figure in a painting that looks just like him. Unable to identify the figure as Dam-Ryung, he grows distraught.
Hurt
E11
HurtFinding out that Jun Jae is a swindler, Cheong leaves home in disappointment and Jun Jae focuses on finding Cheong. Detective Hong who is chasing after Ma Dae Young finds out about Ma's new past, and tries to speed up the investigation.
Sweet
E12
SweetJin Joo feels frustrated that the investment was not carried out properly so she decides to meet Seo Hee again. On the other hand, Jun Jae is caught by detective Hong and he made a call to Cheong but no one answers the call.
Episode 13
E13
Episode 13Joon-Jae is still having strange dreams. Sim Chung hears Joon-Jae say the name Se-Hwa in his sleep. She asks him who he is talking about.
Episode 14
E14
Episode 14With Professor Jin's help, Joon-Jae learns he is an ancestor of Dam-Ryung. To avoid a tragic fate, he decides to protect Sim Chung whatever it takes.
Episode 15
E15
Episode 15Sim Chung's heart will stop without Joon-Jae's love. Upon learning this, Joon-Jae talks about his dreams and finding out that Sim Chung is a mermaid.
Episode 16
E16
Episode 16Joon-Jae and Yoo-Ran have an emotional reunion at Sim Chung's birthday party. Joon-Jae learns why Dae-Young has been chasing him.
Episode 17
E17
Episode 17After almost being caught by Dae-Young, Sim Chung erases his memory. In the process, she witnesses the final moments of Dam-Ryung and Se-Hwa.
Episode 18
E18
Episode 18After Il-Joong's death, detective Hong gets a warrant to search Seo-Hee for evidence. Meanwhile, Chi-Hyun threatens Nam-Doo to get him to cooperate.
Episode 19
E19
Episode 19Chi-Hyun points a gun at Joon-Jae, but Sim Chung jumps in front and is shot. She slips into a coma, causing Joon-Jae to fall into despair.
Final
E20
FinalAt the urging of Jun Jae, Shim Chung returns to the sea to prevent her death. She erases the memories of those who know her as she departs. Once she recovers from her injuries, she returns to Seoul. Jun Jae explains why he remembers her.