In 2016 A.D., a global catastrophe caused part of the land to sink to the bottom of the sea.　　Twenty years later, a new profession called "salvager" was active in the world, whose purpose was to recover the data and goods of countries and companies that had been lost to the seabed due to the recent catastrophe. Among them, Emperor Lanhua is a top-notch salvager who combines outstanding beauty, fighting sense, and calm judgment.　　One day, Aika is asked by a client to investigate and recover the energy substance "Lag", which is related to the previous catastrophe. However, along the way, he becomes involved in a battle with Rudolf Hagen, his sister Nena, and his subordinate Delmo, who plan to wipe out human civilization and build a utopia using the rug.