Eighteen years ago, Kim Su-yeon’s biased grandma dumped her just to force her to keep donating blood to her favored twin brother Hyeon-woo. Saved and renamed Choi Ji-seon, she endured years of tough lonely life. Years later, she walks into her birth family’s corporation without knowing the truth. She gets mocked and degraded every single day, while a random imposter takes over her real identity and enjoys all her wealth and family love. Once all the hidden cruel secrets get laid bare, she fights to grab back everything that belongs to her. Will this broken biased family finally make up for all the pain they put her through?