The exorcist uses his own blood to make a life-and-death contract with the monster and gives part of his body to the monster to live in. They are powerful - they can drive monsters of various abilities to work for them; they are immortal - they can remain young forever regardless of the erosion of time. But they must always be vigilant to prevent monsters from backlash; they must also endure loneliness to avoid being coveted by their peers. Young and handsome Ye Changge is one of them. Under the pseudonym "Old Man", he traveled alone in the world, experienced greed and desire, and experienced jealousy and hatred, but none of these could break the bonds of fate, let alone cover up the light of human nature - loyalty, perseverance, love and protection, which bloom beautifully in the bodies of monsters.
