In 2153 of the old calendar, after the global war, Blue Star was contaminated by nuclear radiation and alien energy.
The law of "contract" has quietly revived, and people can exchange for what they desire by paying a price (memory, emotion, life span, and even body parts, etc.).
When Chen Ping, an 18-year-old orphan, was on the verge of starving to death, he activated the necklace left by his mother, inherited the ancestral "Chen Ji Grocery Store", and became the "Scale Holder".
Randomly move around the world for 2 hours every day, providing "contract transactions" to people in desperate situations.
Explore cost, fairness, humanity, and redemption in the apocalypse, while uncovering the truth behind the world.
