살아 돌아온 해인이 학교로 복귀하고, 기억상실에 걸렸다는 소문과 함께 학교 분위기는 어수선해지게 된다.
혜인 앞에 나타난 해인. 해인이 비밀을 폭로하자 혜인은 충격에 휩싸인다.
With Je Na’s help, Hye In makes it into Diamond 6 and decides to act accordingly. Meanwhile, Hae In regains consciousness in the hospital and returns to Cheongdam International High School, but she appears to have lost her memory. Another new student, Jin Uk becomes the subject of gossip. As the backstories of the main characters gradually come to light, will Hye In be able to make it through school life safely?
