A mermaid from the Joseon period ends up in present-day Seoul, where she crosses paths with a swindler who may have ties to someone from her past.
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Gianna Jun
Shim Cheong / Se-hwa
Lee Min-ho
Heo Joon-jae / Kim Dam-ryung
Lee Hee-jun
Jo Nam-doo / Park Moo
Shin Won-ho
Tae-oh
Shin Rin-a
Seo Yoo-na
Shin Hae-sun
Cha Shi-ah
Moon So-ri
Ahn Jin-joo
Na Young-hee
Mo Yoo-ran
Hwang Shin-hye
Kang Seo-hee/Kang Ji-yeon
Oh Yeon-ah
Young Kang Seo-hee/Kang Ji-yeon/Hong Nan
All 20 episodes plotted by IMDb rating
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20 episodes • 2016Avg: 9.3Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Episode 1 | Nov 16, 2016 | 7.7 |
| 2 | Episode 2 | Nov 17, 2016 | 6.8 |
| 3 | Episode 3 | Nov 23, 2016 | 9.8 |
| 4 | Episode 4 | Nov 24, 2016 | 10.0 |
| 5 | Episode 5 | Nov 30, 2016 | 10.0 |
| 6 | Episode 6 | Dec 1, 2016 | 10.0 |
| 7 | Episode 7 | Dec 7, 2016 | 10.0 |
| 8 | Episode 8 | Dec 8, 2016 | 10.0 |
| 9 | Episode 9 | Dec 14, 2016 | 10.0 |
| 10 | Episode 10 | Dec 15, 2016 | 10.0 |
| 11 | Episode 11 | Dec 21, 2016 | 10.0 |
| 12 | Episode 12 | Dec 22, 2016 | 10.0 |
| 13 | Episode 13 | Dec 28, 2016 | 10.0 |
| 14 | Episode 14 | Jan 4, 2017 | 5.5 |
| 15 | Episode 15 | Jan 5, 2017 | 7.2 |
| 16 | Episode 16 | Jan 11, 2017 | 10.0 |
| 17 | Episode 17 | Jan 12, 2017 | 8.5 |
| 18 | Episode 18 | Jan 18, 2017 | 10.0 |
| 19 | Episode 19 | Jan 19, 2017 | 10.0 |
| 20 | Final | Jan 25, 2017 | 10.0 |
