Song-A (Yoon Se-Ah) and Hyeon-A (Jin Seo-Yeon) are twin sisters. and they are best friends with Se-Na (Kim Min-Kyung). Song-A in particular cares and trusts Se-Na like a blood related sister. Due to Se-Na's betrayal, Song-A and her family fall into ruin. Song-A decides to take revenge on Se-Na.

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