Park Sandara is rich, beautiful and kindhearted girl. He mom died giving birth to her that is why she grew up without a mother, but she is cherish and love by her family, her brother Lyndon and her Father. That is why when her Father remarried, she openly accepts her stepmother, Hee-Ae and her daughter Yeon-Seo.

She thought everything was perfect because at last, she will have a complete family. But everything falls into chaos one day.

She was framed for poisoning her Father and thrown into jail.

She wished that she could turn back time to make things right and protect her love ones before taking her own life.

Then when she opens her eyes, she was back in her old room in the mansion, 5 years before that unfaithful day.