Lee Eunhyuk inherited his father's fortune years ago. His favourite thing in the whole world is the ocean. He enjoys regularly taking dives into the deep blue sea from his expensive yacht.

One day he decides to pay his cousin a visit, asking if he would like to explore the ocean as well.

His cousin, Kangin, agreed almost immediately and together they will explore the mystery of the underwater world.

Will they learn a lot more about the ocean then they first expected?

Lee Eunhyuk inherited his father's fortune years ago. He decided to use this money to buy a large boat so that he could cruise across the wonderous ocean and go diving whenever he pleased.

One day he decides to invite his cousin, Kim Kangin, along on one of his diving trips so that he could also explore the mysterious deep blue sea.

Will they find out more about the vast ocean then they expected?