When Rebecca was 12, Eric kissed her on her doorstep. Now, Rebecca is 22, Eric is her fiancé, and she just caught him kissing another woman.
His excuse? He was conducting an experiment to resolve the what-if effect: a correlation between a lack of varied romantic experiences and divorce rates. To balance the results, Eric insists Rebecca conduct her own experiment.
Heartbroken, Rebecca is lost in a tidal wave of contradictory emotions. More disheartening, her pain is met with deaf ears. Her family and friends still expect she will:


Get a perfect score on the MCAT.
Be the perfect maid of honor at her best friend's wedding.
Forgive Eric because it was only a kiss, and he is her perfect match.


The only person Rebecca can confide in is Christian. Her classmate had been practically a stranger, but he witnessed the kiss. They bond over similar heartbreak. He validates her feelings instead of brushing them aside. As their bond grows, she wonders if it could be more.
Now, she is torn between a picture-perfect life with the man who broke her heart or something unknown with the one who's trying to stitch it back together. To choose, Rebecca must discover who she is when she isn't pretending to be perfect.