Chang Yoomi, a recent college graduate, has landed herself an internship at one of Seoul's most esteemed enterprises. While her qualifications are shaky, after rescuing the heir to the company, Kim Jongin, from drowning, she is offered a position at the company in exchange for her silence. She gratefully accepts it, but what she does not know is how it would change her life. Alongside her best friend Taeyeon and Luhan, she must find her footing before she is into the world of chaos, business, and backstabbing - the real world.