A sweeping Korean romantic drama, The Heirs (2013) follows wealthy high-school heirs navigating love, power, and family expectations. When privileged chaebol heir Kim Tan falls in love with hardworking outsider Cha Eun-sang, their relationship challenges social class boundaries and corporate traditions, creating a powerful story of romance, rivalry, and destiny among Korea’s elite.
Cha Eun Sang is a 17-year-old daughter of a mute housemaid of a wealthy family whose 17-year-old son, Kim Tan, she meets while looking for her never-do-well sister in the United States.
After being left stranded by her sister and having her passport taken away by the police, Cha Eun Sang accepts Kim Tan's offer of staying at his house.
While trying to delay Eun Sang from returning to Korea, Tan takes her with him to meet his half-brother, Won, who has arrived in the U.S. on a business trip. Meanwhile, Eun Sang's mother, Hee Nam, accidentally overhears her employer's mistress, Ki Ae, talking about getting rid of his second wife.
Eun Sang and Ra Hael, Tan's fiancee who came to visit him in the U.S., return to Korea. Upon returning home, Eun Sang discovers that her mother has been evicted and has moved into her employer's home. Missing his family and Eun Sang, Tan returns to Korea, much to Won's dismay.
To his shock, Tan discovers that Eun Sang and he are living under the same roof. He shadows her as she helps her mother with her household duties. Unbeknownst to him and his brother, their father is keeping taps on their respective relationships with Eun Sang and Hyun Joo, and in response, has offered Eun Sang a scholarship to Jeguk High School, a school for the elite and wealthy.
Eun Sang and Tan begin their first day at Jeguk High School. While Eun Sang is introduced to the social class system of the school, Tan clashes with his former best friend, Young Do. Meanwhile, Tan and Won's relationship worsens as their father decides to introduce Tan to his company's board.
Young Do becomes suspicious of Eun Sang's social status and her relationship with Tan as he bullies a boy of a lower social class, leading to a physical fight between him and Tan. He threatens to expose Tan's secret of being an illegitimate child if he doesn't transfer to another school.
Tan confesses to Eun Sang that he likes her but she is reluctant to reciprocate because of their class differences. Eun Sang wants to reveal the truth about her poor background to the other students but is advised otherwise by her best friend, Chan Young. Meanwhile, Young Do disrupts his family's photo shoot by inviting one of the women his father is having a dalliance with.
Furious over Young Do's behavior towards Eun Sang, Tan initiates another physical fight with him. Eun Sang skips school the next day, upset over the trouble that Tan has got into because of her. Meanwhile, Ki Ae pretends to be Eun Sang's mother to attend a parent's meeting at the school, inadvertently helping to cement Eun Sang's lie about her family.
Young Do meets Ki Ae, Tan's real mother, for the first time and is surprised to also see Eun Sang arriving at Tan's home after school. The midterm exam results are released as the students prepare for school camp. Ra Hael requests for an end to her engagement with Tan in front of their parents in retaliation against his relationship with Eun Sang.
