After getting her heart broken, 23-year-old Diana Gomez is afraid to fall in love again. But when her office crush Paul invites her to join a running club with him, she goes for it.

What she doesn’t know is that to be a part of the club, she actually has to train for a half marathon—and that she’ll meet Joshua, the handsome club veteran who becomes her unofficial running buddy.

As if it isn’t hard enough to do speed work, interval training, and long runs after work and on weekends, she has to deal with her feelings for both boys and face her fears of falling in love.

Will she reach the finish line without getting herself (or her heart) injured? Journey with Diana as she reaches running milestones, overcomes obstacles, pushes herself to the limit, and discovers the strength within her… one kilometer at a time.