Past or Future

David, 15 years old, has a bicycle accident. Fatally injured, he is rescued by curious individuals who take him away, in their ship. His friends and family will do anything to find the origin of its disappearance. A special army unit will be call to investigate. David is on Earth in the year 2200, after having pass a black hole. Rescued by nano-robots, he will notice changes: humans all speak the same language, the currency no longer exists; vegetation is almost non-existent, marine life has disappeared because of acid rain; violent thunderstorms break out at any time. New technologies now exist: control of antimatter, teleportation... In this confusion between space-time, a sincere friendship will be born, a love story will try to see the light of day, but where does reality stop, where does fiction start?