On a little planet called Earth, a man with overwhelming power lurks in the shadows. He goes by many names:

King of Assassins

Demon King Rai

God of Destruction

Immortal Assassin

His name is Rai, a rank SSS assassin, feared by many. He never fails to complete a mission.

On the day he assassinated the King, a bounty of $300,000,000 was placed on his head.

However he simply ignored it as there is no one on Earth capable of killing him.

Something completely unexpected occurred, his best friend Azur got obsessed with greed and betrayed him. The once mighty and fearsome King of Assassins, has been pierced in the heart by his best friend Azur.

"Haha… is this how you repay me for taking care of you for 10 years?"

Completely shocked at the turn of events, he exploded with rage and completely vanished in thin air… Only to be reincarnated in another world in the body of an infant.

Follow the story of Rin seeking revenge for his death and obtaining supreme, overwhelming absolute power that shakes the Land and devours the Heaven.