When a Man's in Love

Han Tae-sang is a successful, self-made businessman with a ruthless past tied to loan sharking, having once been the abused henchman of a brutal boss. When he meets Seo Mi-do, a fiercely ambitious and struggling young woman working part-time to support her family, he is immediately captivated by her resilience and spirit, funding her education and paving the way for a better life. Years later, Mi-do enters Tae-sang's company as an employee, and though he hopes for romance, she remains conflicted due to her obligations and the stark differences in their worlds. The dynamic shifts drastically when Mi-do meets Lee Jae-hee, a charming, bright, and ambitious young man working under Tae-hee who happens to be the estranged younger brother of Tae-sang's former rival and business partner. As Mi-do and Jae-hee develop a clandestine romance behind Tae-sang's back, a web of betrayal, jealousy, and revenge begins to unravel. Tae-sang's intense, obsessive love turns into a dangerous force as he discovers the betrayal, threatening to destroy everyone involved while he fights to retain his empire and his dignity.