Eversince her parents died, Kim Hana was left with nothing. All she got was her brother, Kim Haneul. Her parents house, company, and etc which was supposed to be hers and her brother were taken away by her aunt and her uncle, Park Hansoo and Park Jinhwan. Hana was only 12 years old and Haneul was only 3 years old. Haneul was the only family member that Hana have so in order to protect Haneul, Hana got no choice but to sign the agreement to give everything that her parents left for them to her aunt. Every single day, both Hana and Haneul were abused. Until one day, Hana decided to ran away with her brother. That was the only way she could think off in order to get away from the abuse. She was sad to see Haneul who was only 3 to get abuse everyday. However, it was a bad choice to ran away. She lost her brother at that moment. 

She was saved by a couple, Lee Minjoo and Lee Taejoon. Lee Minjoo and Lee Taejoon have been trying for years to get a child but they couldn't. They decided to adopt Hana. From then on, Hana changes her name from Kim Hana to Lee Hana. 

By the time Hana was 21, she already took over the Lee's company. There was a project where two company decided to work on. Whenever there's a project to work on, Hana will do a background check of her client company. When Hana was doing her research, she came across a familar name. The President of the company was Park Jinhwan. When she looked at his picture, she was shocked. It was her uncle. Thus, she did more research about the Park's company. She saw articles about the new President who will be taking over Park Jinhwan position. It was Park Jihoon, their son. Hana then remembered about what her aunt and uncle have done to her family. She then smirked. An idea came into her mind. She decided to get back what was supposed to be hers.

While working together for the project, Park Jihoon fall for Hana. At first Hana was disgusted. But Hana decided to take revenge especially when Jihoon's parents couldn't recognized her. She was determined that she could get everything back one day.