Su Tang transmigrates into the body of a cannon-fodder female supporting character who shares her name in a world that turns out to be a novel. Su Rou is the heroine, loved by everyone, who would gladly give up everything for her. Although Su Tang is Su Rou’s younger sister, she is only a disposable side character. They both join the Yuheng Sect, where Su Rou is blessed with a top-grade single fire spirit root, while Su Tang has only five spirit roots and is considered useless. From childhood, she is constantly compared to Su Rou and has to tread carefully every day. Whatever she has must go to Su Rou; if she refuses, she is guilt-tripped in every way imaginable. Then, during a trial in a secret realm, a fifth-rank monster pursues the sisters. Su Rou pushes Su Tang in front of it to die in her place and escapes. In the end, Su Rou sheds only a few tears and receives comfort from everyone. No one cares how Su Tang died. Su Tang’s only response is: Let it all burn.