After finally waking up from a year-long coma that was caused by an accident, all Hye Yun can remember is that she has to kill someone. Not knowing who or why she is supposed to do so, she leaves the hospital hastily in search of this mysterious man.    Along the way, due to sudden agonizing headache, she faints on the street where a kind hearted male, Lee Dong Hae, who was out patrolling the streets, comes to her rescue. He brings her to his home where she tells him her story. Her

  After being cheated on by her first love, Byun Baekhyun, Kim Taeyeon turns into a cold hearted girl.    After moving to Seoul, warm-hearted and carefree Oh Sehun attends a new school, where he meets the one and only Kim Taeyeon who refuses to show him any attention despite his numerous attempts to talk to her.    Will he finally be able to move her heart?    Will Taeyeon accept Sehun's feelings?    Will they finally fall in love?