"Seven people return, the hub wakes up... Ten years later, time and space begins..."
An appointment at a factory radio station awakens the sleeping world of powers and exclusive keys for seven people. From the music scores of the Southern Song Dynasty Storytelling Field, to the old licenses of the radio stations of the Republic of China, to the defense maps of the future battlefield, the seven people travel through different time and space, and with the belief that "one person guards one world, seven people protect one heart", they repair the hub of time and space and seal the rift in the void.
