Yeji enters a 19+ dating show with a huge cash prize for her boyfriend who lost everything. The only way to win the 1.9 billion prize is to spend the night with another man. There, she meets Jae-hyun, her first love, and Do-hyuk, the ex-husband she broke up with after an affair. Between true love, the 1.9 billion prize, and her own desires—what will Yeji choose?