On June 6, 2008, in an old residential building, multiple people carrying future memories simultaneously restart their lives. Living in the same building, everyone initially thought they were the only one reborn in the world. Encounters in the hallway time and again make them test each other, successively seeing through each other's identities, forming an alliance, and relying on future foresight to rewrite their respective life trajectories. As more and more reborn people appear one after another, everyone gradually senses that behind this collective rebirth lies an unknown, huge secret. Centered on the unique worldview of an old building with multiple reborn people, this series tells the story of ordinary people from different identities making up for past regrets, playing games and strategizing on the path of rebirth, and counter-attacking to grow.