Auzou Book 2105, forbidden memory

In 2105, there are two social classes: the privileged - who, when they reach adolescence, receive a sérum enabling them to live for 400 years - and the ordinary. Once a year, a major competition is organized to enable ordinary teenagers to receive the precious sérum. The tests focus on their cerebral capacities. Young So decides to take part, but incredible events will make her realize that a bacteria revealing memories from 2015 is nestled in her brain. And some people will do anything to get their hands on her memories.