Bohol Island, Philippines, captivates tourists and divers worldwide with its beautiful scenery and deep-sea mystery. One day, friends who knew in Seoul visit a man who works as a freediving instructor in Bohol.
| Actor | Role |
|---|---|
 Choi Yeo-jinNot listed | Not listed |
 Jung Chae-YulNot listed | Not listed |
 Ryu Seung-suNot listed | Not listed |
 Seo RinaHa-na (하나) | Ha-na (하나) |
 Heo Dong-wonNot listed | Not listed |
 Ahn Ji-hyeNot listed | Not listed |
 Kwak Jin-seokNot listed | Not listed |