The Earth was almost completely destroyed, but human civilization was not gone. People built the Delta complex, which has become a shelter for survivors.
People who live in Delta are called colonists. Their main goal is to collect and accumulate information for its transfer to future generations. To increase the speed and efficiency of works, the colonists pass erase procedure (partial memory lock). Life here is subjected to strict rules, colonists live in absolute solitude. They don't have names; they only have personal sequence numbers. Your number is 183 and you're the ordinary colonist. With you, as with other colonists, does nothing unusual, but one day your life changes. Can you take the chance to find out the secrets of the Delta?
The choice is yours.