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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.
Gianna Jun
Sim Chung / Se-hwa
Lee Min-ho
Heo Joon-jae / Kim Dam-ryung
Shin Hye-sun
Cha Si-a
Lee Hee-jun
Jo Nam-doo / Park Moo
Shin Won-ho
Tae-o
Hwang Shin-hye
Kang Seo-hee
Sung Dong-il
Ma Dae-young / Mr. Yang
Moon So-ri
Ahn Jin-joo
Choi Jung-woo
Heo Gil-joong
Na Young-hee
Mo Yoo-ran
Lee Ji-hoon
Heo Chi-hyun
Park Hae-soo
Hong Dong-pyo
Krystal Jung
Min-ji
Shin Eun-soo
Young Sim Chung
Kal So-won
Young Sim Chung
Jinyoung
Young Heo Joon-jae
Jeon Jin-seo
Young Heo Joon-jae
