Lee Sanghyuk is the Vice President of the chaebol family Lee Sang Group. He is an adopted son from an orphanage, but unlike Lee Taegon, the biological son of the chairman, he had gained trust with his sincerity. However, when Taegon, who was a spoiled brat, suddenly declares that he will learn the company’s business and demonstrates more than expected results, Sanhyuk is in danger of losing what he has built. Sanghyuk decides, “I’m going to tame this brazen master.”