In a world where one is a two and every second is seen by his first, a world in which humans repressed awareness speaks. Secrets, lying, cheating of one are transparent to his second. Those seconds are named echoes; They're reflections of their first's subconscious. Nonetheless, they are free souls.
If a one resonates in another person's soul, then he had touched this person's deepest secret. However, once this sin is committed his echo departs from him.
Resonance is a controlled act but is not well understood by the public as it became prohibited in 2028 by the council; which is the highest legislative body in the world that is mainly composed of seven first rank councillors, twenty-one-second rank councillors and thirty-five third rank councillors. since then protecting measures are taken worldwide to control that specifically by transplanting sensors in new-borns which can sense the metabolic and hormonal changes associated with resonance. Therefore, People who commit this felony are apprehended, interrogated and isolated from society in areas called neighbourhoods. In order to have further understanding and control the occurrence of these incidences. Every neighbourhood is under full-time surveillance and every resident there is deeply interrogated by specially trained investigators.