Nam Da Reum gets a job at APPELLO, a fashion platform company connected to Lee Chan, an idol turned actor she has loved for years. But instead of the fan life she dreamed of, she keeps clashing with the strict workaholic CEO Kang Ha Gi, begins to misunderstand the strange bond between Ha Gi and Chan, and gets pulled into a secret she believes she must protect. Set in a stylish startup workplace, the series unfolds as a lively romantic comedy about career growth, romantic confusion, and a complicated love triangle.