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.

A former volleyball star, Woo-jin has been struggling to keep his children's volleyball school that's about to go out of business. Left without much choice, he agrees to coach a women's volleyball team that is the worst in the league, with only second rate players and an eccentric club owner. According to Woo-jin's contract, all he needs to do is win just one game.