素賢是一位十九歲的少女，她的生活中充滿著苦難和不幸。某天，她下定決心離家出走，想找尋自己不幸的原因，卻在某處遇上完全意想不到的情況…

素賢為了達成目標，決定利用允浩。另一方面，素賢偶然得知有美為了找尋自己，聯絡了某人…

So Hyun tells Bok Hee the truth and apologizes for lying to everyone. Even though Bok Hee promised not to tell Jae Young about it, So Hyun changes her plan and wants to get rid of Bok Hee as soon as possible. Meanwhile, Jae Young suggests going on a trip together, and So Hyun decides to carry out her new plan during the trip.

After So Hyun finds out the truth about Jae Young, she regrets what she has done to everyone, but it was too late to take it back. She goes back to Yu Mi to spit her anger out at her. However, she starts to think that she was the only problem, not the people around her. Therefore, she decides to disappear and leave them alone.