As humankind develops, separatist forces expand, and some humans mutate and gradually begin to coexist with humanoid species.
Pei Qing searched for the hidden secrets of his family in countless rebirths, until one time he accidentally broke into Muchi's safe house.
Mu Chi is a killer who travels around all walks of life. He has immortality. He doesn't know how many years have passed, but he is just looking for a missing memory.
His heart was silent until he saw Pei Qing covered in injuries in the safe house where no one could break into, and he began to have new emotions.
He needed a helping hand, and he had nothing to do, but the hand he held didn't let go.
The secret of the Pei family is also the secret of the world. They cooperate until they reach the end of this secret, and then overwrite it endlessly.
Mission: Perseverance, failure is the mother of success, harmonious symbiosis