In 2169, people are born genetically engineered with a digital clock on their forearm. When they turn 25 years old, they stop aging and their clock begins counting down from one year;[Note 1] when it reaches zero, that person “times out” and dies. Time has become the universal currency; it is used to pay for daily expenses and can be transferred between people or capsules. The country has been divided into “time zones” based on the wealth of the population. The film focuses on two specific zones: Dayton – a poor manufacturing area where people generally have 24 hours or less on their clock at any given time – and New Greenwich – the wealthiest time zone, where people have enough time on their clock to live for centuries.