Legend of the Blue Sea
K-dramaKorean drama storytelling: emotional arcs, romance beats and format traditions.This show: 10/10Love storyA love story as the engine of the show, not a side plot.This show: 9/10WhimsicalPlayful, fanciful and lightly magical in sensibility.This show: 8/10Romantic yearningThe will-they-won't-they ache as the main draw.This show: 8/10SentimentalOpenly emotional storytelling that reaches straight for the heartstrings.This show: 7/10Warm humorAffectionate comedy that genuinely loves its characters.This show: 7/10
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Starring
Jun Ji-hyunLee Min-hoLee Hee-joonShin Won-hoChristina ShermanShin Rin-ah
Starring
Jun Ji-hyunLee Min-hoLee Hee-joonShin Won-hoChristina ShermanShin Rin-ah
Ratings per Episode
Votes per Episode
Legend of the Blue Sea Episode Ratings Heatmap
| Avg | E1 | E2 | E3 | E4 | E5 | E6 | E7 | E8 | E9 | E10 | E11 | E12 | E13 | E14 | E15 | E16 | E17 | E18 | E19 | E20 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S1 | 8.1 | 7.7 | 8.0 | 8.0 | 8.1 | 8.2 | 8.3 | 8.1 | 8.1 | 8.1 | 8.5 | 8.1 | 8.3 | 8.2 | 8.2 | 8.5 | 8.0 | 7.9 | 8.4 | 8.1 | 7.9 |
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About
"A mermaid fairy tale carried by star chemistry"
A small-time con artist in Seoul crosses paths with a mermaid who has taken human form, sparking a whimsical romance tangled up with memories of a past life centuries earlier. The show mixes slapstick comedy, fairy-tale fantasy, and melodrama, anchored by its two charismatic leads. Early episodes are breezy and charming, driven by fish-out-of-water gags and genuine chemistry, though the back half slows considerably as the plot leans harder into angst and family drama. It's a comfort watch more than a tightly plotted one, best enjoyed for mood and star power rather than narrative rigor.
Watch it for
the effortless chemistry and charisma of its two leads carrying even the slower stretches.
Maybe skip if
you dislike melodrama-heavy pacing or find whimsical fantasy premises hard to buy into.
Written by our AI editor to help you decide, spoiler-free by design.
All Seasons
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Season 12016
8.13K201h 1m
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?
| Ep | Title | Rating | Yours | Votes | Runtime | |
|---|---|---|---|---|---|---|
| ▶ | 1 | Destiny | 7.7 | 216 | — | |
| ▶ | 2 | Meet | 8.0 | 178 | — | |
| ▶ | 3 | Find Again | 8.0 | 167 | — | |
| ▶ | 4 | Premonition | 8.1 | 165 | — | |
| ▶ | 5 | Reduplicate | 8.2 | 147 | — | |
| ▶ | 6 | Jealousy | 8.3 | 151 | — | |
| ▶ | 7 | Jealousy For Love | 8.1 | 148 | — | |
| ▶ | 8 | Sincere | 8.1 | 140 | — | |
| ▶ | 9 | Reveal | 8.1 | 143 | — | |
| ▶ | 10 | Altruism | 8.5 | 157 | — | |
| ▶ | 11 | Hurt | 8.1 | 144 | — | |
| ▶ | 12 | Sweet | 8.3 | 141 | — | |
| ▶ | 13 | Episode #1.13 | 8.2 | 140 | — | |
| ▶ | 14 | Episode #1.14 | 8.2 | 139 | 61 min | |
| ▶ | 15 | Episode #1.15 | 8.5 | 140 | — | |
| ▶ | 16 | Episode #1.16 | 8.0 | 134 | — | |
| ▶ | 17 | Episode #1.17 | 7.9 | 134 | — | |
| ▶ | 18 | Episode #1.18 | 8.4 | 147 | — | |
| ▶ | 19 | Episode #1.19 | 8.1 | 148 | — | |
| ▶ | 20 | Final | 7.9 | 159 | — |
Full Cast & Crew
Cast
Jun Ji-hyun Shim Chung
Lee Min-ho Heo Joon-jae
Lee Hee-joon Jo Nam Doo
Shin Won-ho Tae-oh
Christina Sherman Child Sim Cheong, Nurse
Shin Rin-ah Seo Yoon-ah
Oh Yeon-ah Mr. Yang's fiance
Sung Chang Hoon Mr. Yang's subordinate
Shin Hye-sun Cha Si-ah
Moon So-ri Ahn Jin-joo
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