· Protagonist: Su Nian, 25 years old, was bound to the system after his accidental death. He needs to enter various small worlds to complete tasks before he can be resurrected.
· System: Numbered "Healer 007", responsible for guiding Su Nian to complete the task
· Mission goal: Save the male protagonists who are about to turn dark in each world, become the only light in their hearts, and prevent the world from collapsing
· Special setting: The male protagonist in each world is a different projection of the same soul. Every time Su Nian leaves a world, the male protagonist in that world will retain his memory of her and wait for eternity.
