Itaewon Class tells the story of Park Sae Roy who is uncompromising in the face of injustice as he goes up against the food industry conglomerate in Itaewon. Meanwhile, Jo Yi Seo is a highly intelligent sociopath with the face of an angel but a completely different personality. Finally, Oh Soo Ah is an honest and confident woman who was Park Sae Roy's first love and is now an employee of a rival company.