Despite her painful childhood, Dan-hee grew up to be a tenacious, optimistic go-getter who dreams of becoming a world-class professional softball player.
Although tormented from the memory of being humiliated by her ex-boyfriend Ha-jin, Dan-hee makes a pact with herself to move on.
Ha-jin starts working in Jae-myung's father's company and does everything to make the rich chairman like him, shrewdly climbing the corporate ladder until he becomes the boss's right-hand man.
Jae-myung becomes the team's coach, and he falls in love with Dan-hee whose headstrong and optimistic personality attracts him.
The drama's rating is imperatively decreased at the middle of the series was due to a football season.