3 girls & 3 boys meet during high school. Known as playboys, one of them is a snob and called 'Mr. Don't Know Who' by Sandrina. After graduating from high school, they lived separately. The boys continue to study in the USA. Sandrina & friends are staying in Indonesia. Unexpectedly, the grown up Sandrina meets again with 'Mr. Don't Know Who'. He tries to win her heart. Is this fate? or, an old karma that wants to say hello?