Traumatized upon seeing the death of a loved one with his own eyes, Suihara Tatsuya now irrationally fears the ocean and all of its waves. His younger brother Hayato, on the other hand, views his father's heroic last moments as an inspiration to face challenges head on with all of his heart.
Years later, Hayato becomes the ace swimmer of his school and promises to his dad that he will do his best to bring back his brother into the water. Despite his efforts, Suihara continues to believe that the ocean is nothing more than a death trap that took away his happiness and keeps blaming himself for the unfortunate accident.
One day, the two find themselves stranded on an isolated island with no means of transportation available.
Suihara now has to face the hardest challenge that awaits him…