This is a story about a happy-go-lucky guy and a girl who doesn't know how to smile. That's because of the past they're keeping. Timothy Wyndelle Harrison keeps the biggest mistake he have done through smiling. Lhouiza Fhaye Wilson keeps her sorrowful past through distancing herself from everyone. They've met, and as Timothy tries to get to know her more, Lhouiza keeps on pushing him away. As months passed by, they've slowly fallen for each other but keep on denying it from themselves. Will that thing called "love" would be enough to finally forget and get over from their past? Or that would just be the beggining of their miserable life when they discover each other's untold secrets? Especially that one of them has this unforgettable mistake.