Watch The Legend of the Blue Sea Season 1 Episode 4 Online
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- COUNTRIES: Palau,South Korea,Spain
- Subtitles: 한국어/조선말
Jun 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 three months.