In 2025, a secret project called "Engraving" was launched - to completely transplant the consciousness and memory of top agents into the brains of death row prisoners, making them become "successors" and continue to perform unfinished tasks. The protagonist, Lu Yan, wakes up and finds that he has become such a "successor". He possesses the combat instinct and some memory fragments of the original agent "Nighthawk", but he only does not know what the mission goal is, let alone why the original agent died. In the process of tracing the truth, he must distinguish which memories belong to him and which belong to "Nighthawk", and find that he is being hunted by a group of "imprinters" who also have multiple memories.
