The Heirs follows a group of privileged, elite high school students as they are groomed to take over their families' business empires. These wealthy students seem to have everything under control, except their love lives. Kim Tan is heir to the Empire Group sent to study abroad in the US In reality it's a form of exile, as his elder half-brother back home schemes to take over the family business. While in the States, Kim Tan bumps into Cha Eun-sang, who has arrived from Korea in search of her older sister. He feels himself falling for her, never realizing that she's the daughter of his family's housekeeper. When his fiancée, Rachel Yoo, arrives to bring him back to Korea, his heart is torn between love and duty. Meanwhile, Rachel's stepbrother Choi Young-do develops his own crush on Eun-sang.