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.

• Choi Yeo-jin
• Jung Chae-Yul
• Ryu Seung-soo
• Seo Rina
• Heo Dong-won
• Ahn Ji-hye
• Kwak Jin-seok