Young-seok, who feels overwhelmed and lonely in what should be his glorious youth, meets a woman who introduces herself as Josée, and they share a once-in-a-lifetime romance.
The probability of a couple that had broken up getting back together and having a successful relationship is just 3%. Dong-hee and Young, who had broken up over a minor tiff, later realize their love for each other and end up getting back together. But will they be able to fit into the 3% bracket?
Su-jin who tries to pursue a perfect life as a successful lawyer, single mother and daughter, plans to send her daughter Gina to study abroad in the United States, where her ex-husband lives. When Su-jin gets busier with work, Su-jin's dad, In-woo moves in to help Su-jin take care of Gina. The three live together for some time, until one day, Su-jin gets into a car accident and receives an unexpected diagnosis.
