Emma has known Adam since their first grade. She's been in love with him for as long as she can remember. They're best friends and people call them jokingly 'M&Ms'. But what if Emma's feelings are mutual? Lili's suffering because of her parents' divorce. To shush the pain she's overwhelmed with, she goes to Italy where she meets a charming young painter whose name's Adam. Can a meaningful encounter grow into real love? Fate turns Lili and Emma into step-sisters. Now they share everything they have: house, friends and ... love. Is it just a blast of passion or a feeling grown over years? What will each of the girls choose?