Jinsuk转学到了一个新的高中，在哪里，她遇到了一个非常友好的同学Eunyeong，当母亲受到潜伏虐待后，Eunyeong和母亲一起逃到了Jinsuk家，但随即Eunyeong的母亲和Jinsuk的钱一起消失了…

Transferred to a new high school, Jin-suk, meets a friendly classmate, Eun-yeong. However, Eun-yeong doesn’t realize that the reason for the transfer was the result of Jin-suk getting into trouble at her previous school. When the abusive ex-husband of Eun-yeong’s mother gets violent, Eun-yeong and her mother flee to Jin-suk’s home. Since Jin-suk lives alone, the two feel comfortable there. But then Eun-yeong’s mother steals Jin-suk’s money and disappears. Where has she gone? Can Jin-suk and Eun-yeong get the money back from her? The two set out to track her down.

사고를 치고 강제 전학 온 ‘진숙’은 새 학교에서 ‘은영’을 만난다. 처음 알게 된 ‘은영’은 그녀의 엄마와 함께 ‘진숙’의 집으로 찾아오는데 이튿날, ‘은영’의 엄마는 ‘진숙’과 ‘은영’이 집을 비운 사이 ‘진숙’이 남몰래 모아온 현금과 함께 사라진다. 돈과 엄마의 행방을 찾아나선 두 여고생은 엄마의 비밀을 알게 되고 한 재벌가의 살인미수사건에 휘말리게 된다.