Son Chaeyoung, a young buccaneer, has a habit of playing around and making fun of the town police and engaging in a hot pursuit with them. It has been his way of living for seven years since he started sailing the seas of the world.

After escaping a town for being chased once again, he returns to Corona with his crew, the kingdom he considered his home. During his stay there, he notices how different Corona had become over the past several years. It changed from being a bright and jolly kingdom to a dark and gloomy one.

A series of unfortunate events leads him to meeting unfortunate people and discovering tombs no one dares to open. Along with his crew and his own audacity, he takes a journey of high emprise across vast oceans and kingdoms, risking everything he has, including his life, on the greatest adventure he ever had in his lifetime.