An orphan assumes the identity of her twin sister after she goes missing but a bully who followed her from their old orphanage threatens to expose the truth.
EPISODE 1
Episode 1
Eun Bi is a Nuri Girls High School student in Tongyeong; although schoolmates bully her, she doesn't let anyone know and endures it; Eun Byeol and her friends go on a field trip to Tongyeong.
EPISODE 2
Episode 2
Mi-kyung remains in Tongyeong to search for Eun-byeol; So-yeong sees Eun-byeol and tries to bully her again, but Mi-kyung stops her.
EPISODE 3
Episode 3
Eun Bi loses all her memories and ends up living as Eun Byeol; young Eun loses her mother's necklace, but it appears in Eun Bi's locker; Ian helps Eun Bi so she can regain her memories, and Eun Bi also starts to adapt herself to Eun Byeol's life.
EPISODE 4
Episode 4
Eun Bi regains her memory; she is sad that she is no longer Eun Byeol at Segwang High, but she decides to leave her school and home; So Yeong, who bullied Eun Bi in Tongyeong, transfers to Segwang High.
EPISODE 5
Episode 5
Tae-gwang develops a crush on Eun-byeol; I-an fails to tell Eun-byeol what is on his mind and just leaves the medal behind out of jealousy.
EPISODE 6
Episode 6
So Yeong tries to put Eun Bi in danger as she turns her friends in class three over to her side; Ian wants to help Eun Bi to find her memory, but she refuses Ian's favor as she believes that she is not Eun Byeol, which makes him sad.
Kim So-hyeon
Yook Sung-Jae
Nam Joo-hyuk
Lee Pil-mo
Cho Soo-hyang
Jeon Mi-sun
Baek Sang-Hoon
Kim Seong-yun
Jung Sung-hyo
Han Sung-ho
