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.
Shim Cheong / Se-hwa
Heo Joon-jae / Kim Dam-ryung
Jo Nam-doo / Park Moo
Tae-oh
Seo Yoo-na
Cha Shi-ah
Ahn Jin-joo
Mo Yoo-ran
Kang Seo-hee/Kang Ji-yeon
Young Kang Seo-hee/Kang Ji-yeon/Hong Nan
Heo Chi-hyun
Hong Dong-pyo
Ma Dae-young / Yang Seung-gil
Heo Il-joong
Young Heo Joon-jae/Kim Dam-ryeong
Shim Cheong's Homeless Friend
Manager Nam
Cha Dong-shik
Young Moo Yoo-ran
Young Se-hwa
Jang Jin-ok
Yoo Jong-hoon
Young Manager Nam
Child Se-hwa
Child Heo Joon-jae/Kim Dam-ryeong
Professor Jin Kyung-won/Fortune Teller
Aquarium Manager
Flight Attendant
Jang Jin-ok's Daughter
Mr. Yang's Subordinate
Bodyguard
Missionary Thomas
Nurse
Kim Hee-jin
Mermaid
Mermaid
