Plot Of Rooftop Prince
Past
Lee Kak (later played by Micky Yoochun) is the Crown Prince. When he is ready to marry, Lee Kak wants to marry a beautiful woman. Boo-Yong (later played by Han Ji-Min) and Hwa-Yong (later played by Jung Yoo-Mi) are sisters. Hwa-Yong, the older sister wants to marry Crown Prince Lee Kak, but her father makes it clear that younger sister Boo-Yong will marry the Crown Prince. Hwa-Yong is so upset, she uses an an iron to burn Boo-Yong's face, pretending it was an accident. Now, Boo-Yong carries a big scar on her face. Eventually, older sister Hwa-Yong marries Crown Prince Lee Kak. Time passes and are now adults.
Younger sister Boo-Yong is now a smart woman, good with needlework. Older sister Hwa-Yong is uneasy that her husband, Crown Prince Lee Kak, and Boo-Young get along well. One day, Crown Prince Lee Kak wakes up in the early morning. He finds that Hwa-Yong is not next to him. He feels something strange about the situation and calls for an eunuch. At this time, an eunuch comes running to the Crown Prince and informs him that Hwa-Yong is found dead in a pond. Lee Kak suspects that his wife's death is not by accident. He puts together a team to investigate his wife's death. When the team awaits to interview a witness, a group of assassins appears and chases them. Crown Prince Lee Kak and his men are chased to the edge of a cliff. The group jumps off the cliff.
Present Day
When Park Ha (later played by Han Ji-Min) was young, her father remarried and Park Ha gained older step-sister Se-Na (later played by Jung Yoo-Mi). When their parents left for work, older step-sister Se-na despised having to take care of her younger sister. One day, while younger sister Park Ha sleeps inside a truck, the truck suddenly departs. Even though Se-Na sees the truck leaving, she turns around and pretends that it isn't happening.
Time passes, younger sister Park Ha is now living in America. While, Park Ha sells fruits as a sidewalk vendor, Yong Tae-Yong (Micky Yoochun) sees her and feels a connection with Park Ha. Yong Tae-Moo (Lee Tae-Sung) appears in front of Yong Tae-Young. They are cousins. The following day, the two men boards a yacht. While the boat is sailing, they have a small fight and Yong Tae-Yong falls into the water. His cousin doesn't attempt to save Yong Tae-Yong and actually attempts to hide evidence that he was there. He then jumps into the water and swims away. At this time, younger sister Park Ha receives a phone call that her family has been located in South Korea. Park Ha travels to South Korea and learns that her father has just passed away. At her father's funeral, Park Ha meets her step-mother and older step-sister Se-Na. Park Ha has no memory of how she was separated from her family. Park Ha settles down in Seoul. One night, when she comes back to her rooftop room, she discovers four men, in Korean traditional clothing, sitting in her room.