Roxy's about to turn sixteen, but life isn't so sweet. As a band geek, Roxy can barely get the cute guys to notice her, much less go out with her. Then, on her birthday, Roxy is transformed into a siren: seductively beautiful with the power to control all men. She thought sirens were an ancient myth, but suddenly Roxy can get any guy she wants with just a few notes on her flute.

There are only two rules: don't tell anyone about being a siren, and don't fall in love. When she starts dating Zach, the guy everybody's crushing on, Roxy realizes she could get used to this siren thing...but how can she keep herself from falling in love?