Set in a dystopian future, precisely in the year 2206 where the earth has become an arid planet and life is no longer sustainable. Living beings have holed up underground in a 'sub-metropolis'. This new world was created by the M.A.S. a power company that has managed to gain control of the entire city. Kron, a surgeon/alchemist by profession lives on an Earth that has become an arid planet with unsustainable survival conditions. Kron's goal is to restore livability to the Earth's surface. They will try to stop him in every way, but his strength, which comes from the death of his daughter, will drive Kron to complete this mission.