Wen Chāoxing (aka Cassie or Xin) is the unknown step sister of Wen Junhui (aka Jerry or Jun). She loves to sing and dance, and has a skilled talent for knowing how to read people very well. She loves to tell fortunes a lot as well. When Chāo enrolls into the same Performing Arts school as none other than Pledis Entertainment's very own Lee Jihoon (aka Woozi), Choi Seungcheol (aka S.Coups), Lee Seokmin (aka DK) and Jeon Wonwoo, she realises her mistake,