They are the two sharpest knives in the dark night. They are both killers and fear each other, but they cherish each other in the lonely years, develop a secret love, and become each other's only light.
An accident made the past forgotten and all ties severed;
With a death order, he accepted the destined death, personally delivered the love dagger to him, completed the mission with his life, and died in the tenderness he had forgotten.
When memories flash back, the warmth of the past collides with the farewell of this moment,
He searched for that person in the world, and finally picked up the blood-stained dagger and followed him to hell. They stayed together year after year, relying on each other for life and death.
Intention: Redeem each other, run in both directions, and become better selves in the encounter.