Mikayla Marie Castillo was the definition of a good girl and a good daughter to her parents. She's also not just beautiful, but smart. She was always on top of her class and makes her parents proud. But her almost perfect life changed when her parents got divorced. Mikayla felt alone and unwanted. To get even to her parents, she started doing things a good girl would never do. And that's how a nice girl gone bad! Will Engr. Barnett Buenaventura be able to help fixing Mikayla's broken heart just like the broken bridges he successfully rebuilt? Or will the nice girl be really proven naughty on Christmas?