A family (the heroine, brother, mother, and grandmother) had their tongues cut and could not make any sound. And an unknown girl who loves to sing was imprisoned in a dilapidated high-rise building. One day, the prisoner accidentally sent out a distress signal sos (gesturing with his hands), but it was ignored. (I later found out that a pregnant woman was about to give birth. She believed in superstition and worried that it might be the reincarnation of an evil spirit. She looked up and saw the two siblings who sent the distress signal, imagining themselves as ghosts and ignored the distress signal.) Someone escaped that night and decided to take advantage of the chaos to escape. But her brother was injured, and the heroine could only take the opportunity to escape alone. Being chased late at night, unable to call for help, the surrounding residents turned a deaf ear to the sounds of the chase. The heroine enters a mysterious organization and trains hard. Finally travel through time and space and go back to save your family!