Time

Genetic Binding: The clock is embedded directly into a person's genetic code and begins working when they reach 25 years of age. Limit: At 25, a person receives a basic lifespan of 1 year. After this, aging stops, but the countdown begins. Death: If the clock's time reserve reaches zero, the person's heart stops instantly. Currency: Time is used like money. It can be earned, spent, transferred by hand, or stolen. Zones: Time depends on where a person lives: in poor areas (ghettos), seconds count, while in rich cities, millennia count.

Features of the Universe: Time is the main and only currency: Money has been abolished. People pay for food, housing, and services in seconds, hours, and days. Time is transferred between people via special devices on the wrist. Biological Features: Until the age of 25, people have a one-year reserve on their watch that cannot be spent. After 25, the countdown begins. If the counter on the wrist reaches zero, the person's heart immediately stops. Social Stratification (Time Zones): The world is divided into ghettos and megacities. In poor areas, people live one day at a time, constantly risking death, working for hours and literally running to save every second. The wealthy elite live in luxurious gated cities for centuries, enjoying immortality. Strict Economy: The system operates on a strict balance: prices and wages constantly rise, preventing most ordinary people from accumulating much wealth, ensuring a constant flow of labor (and their time) for corporations. Time Banks: Large financial institutions manage loans. To obtain loans lasting decades or transfer large sums, special capsules and digital accounts are used. Timekeepers: An elite police force that maintains order and law, prevents robberies, and tracks down "fugitives" who attempt to disrupt the time-based resource distribution system.
The biological clock is a genetically built-in timer on the human left forearm.

The dystopian film "In Time" (2011) is set in the near future, where humanity has conquered aging. In the film's world, the human biological clock stops at age 25. After that, everyone lives exactly one year, and to survive beyond that, this time must be earned, bought, or stolen.