Jang Tae Ju grew up in a poor family and witnessed all the hardships and hardships that fell to his father. Alone raising his younger sister Hee Ju, having a bright head on his shoulders and giving all his strength to work, he fights for his dream and strives against fate to make his way up to success and wealth. The contempt of others and a hard life in poverty only fuel his bold ambitions. However, faced with betrayal, pretense and lies, the open and cheerful guy gradually turns into a cold, calculating and heartless egoist. He challenges the Songjin Corporation and fights Choi Min Jae, the nephew of the founder and chairman of the company, a devious, utterly dishonest and unconscionable man.
Choi Seo-young, the second daughter of the chairman of the Songjin Corporation, is a wealthy arrogant heiress who grew up under the warm wing of her parents. Feelings flare up between her and Tae Joo, and Seo Yun faces a difficult choice, because her lover is waging a fierce war against the company of her family.
Choi Min Jae is Seo Yoon's cousin and Tae Joo's main rival in the war for the corporation's dominant seat. Choi Min Jae, the eldest son in the family, is a treacherous man, absolutely dishonest and without conscience. Shadow deals, behind-the-scenes games and undercover intrigues are his element.
Choi Dong Son is the founder and chairman of the largest conglomerate Songjin.
Yoon Sol Hee - beauty reveals all the secrets that she sells to her real estate agency. Despite the danger, she chooses the side of Tae Ju and together with him opposes the Choi family.
Cho Pil Du, a thief in law, gets in the way of Tae Ju when he takes his first steps in the business world. Making money from dirty money, over time, he poses an increasing threat.
Jang Hee Ju is the younger sister of Tae Ju.
Choi Son Jae is the son of the chairman of Songjin Corporation, who dreams of becoming an economist. He works at the Economic Research Institute of his family.