Is there anything more unfortunate and tragic than living under the same roof with someone you hate and pretending to be brother and sister in front of your parents?
Yes, Cheng Nuo and Cheng Dingding can tell you with bloody facts, that is to exchange souls and bodies with the person you hate the most.
Cheng Nuo and Cheng Dingding are the nominal siblings in the reorganized family. They didn't like each other, but they actually switched bodies after an accident...