The world follows the setting of the "Time Planning Bureau", and time becomes the only hard currency, displayed on the timer in the arm or iris. The residents of the rich area ("Eternal Light City") live in centuries and remain young forever; the residents of the slums ("Rust Belt") struggle in seconds and may "return to zero" at any time.
"Athena Corp" developed the "Nemesis System" as a monopoly. This system can accurately locate, extract and encapsulate specific human emotional memories, especially high-purity "happy memories". After the sale, the memory and accompanying emotions will be permanently erased from the giver's brain.
Rich people don't buy packaged "happiness memory chips" just for experience. Absorbing these memories through the "Nemesis Terminal" can be converted into a biological energy called "Aura". "Aura" can significantly delay cell aging, increase energy and even bring a short-term sense of extreme pleasure. It is a higher-end luxury than simply extending time and a necessity to maintain a luxurious life. This creates a rigid demand.
The memory hunter is a derived high-risk profession. They wander around the Rust Belt, using various means (information buying and selling, emotional inducement, and even coercion) to find targets with high-value "happy memories" (usually desperate poor people), persuade or force them to sell their memories, and draw huge commissions from them. They are the key "catchers" in the industrial chain, with both cold-bloodedness and conscience.
Intention: When life can be bought and sold and memory can be transplanted, how can we define who "I" am?