Jang Okjung, the most favored concubine of King Sukjong in 17th-century Korea, was executed by poison for treason. When she wakes up, she finds herself in the body of a 23-year-old woman Kang Yena in modern-day Korea. An ambitious and greedy woman by nature, Jang Okjung swears to become powerful once again. She attempts to seduce the elderly widow CEO of Korea's biggest company JG, but he has no interest in her. It is then that the CEO's ruthless third son, Jung Min, makes her an offer of alliance. He asks her to marry him and help him get chosen to be the heir to his father's business empire. In her former life, Kang Yena chose power over love in a heartbeat. This time, will she be able to capture both?