The afternoon before the enormous concert afternoon of Soo-min, her faculty friends Won-ho, Sun-ki, Hong, along with Jin-sook accumulate to observe Soo-min. Having pleasure along with talking in their memories that are older seems like a happy moment of older pals. But soon when the bathroom is left into by Soo-min, Jin-sook starts a disturbing story that she's been sexually abused by her dad and brother after the passing of her mom. As all friends are all shocked, one by one starts to talk about the whole secrets of Soo-min without even knowing Soo-min is over hearing their conversation, like they know everything about her. It compels Soo-min into this irrevocable revenge with secrets .