Back from overseas and ready to step into her old life, Emily finds herself trapped in a marriage her grandfather has already arranged. When she learns the William family company is facing a crisis, she hides her true identity and enters the business to track down the traitor from within. There, coworkers mistake Nora—the new hire who started the same day—as the heiress and pile on the praise, while Nora, Emily’s longtime school rival, keeps suppressing her at work. Theodore, the CEO, can’t stand Nora’s conduct and moves to cancel the engagement with the William family, not realizing the woman stealing his heart is Emily, the hardworking and gentle heiress he is meant to end up with.