Sometimes, the cost of love is too steep Olivia's twin brother, Liam, has been her best friend her whole life. But when he starts dating, Olivia is left feeling alone, so she tries to drive away Liam's girlfriends in an effort to get her best friend back. But she meets her match in Zoey, Liam's latest fling. A call-it-like-she-sees-it kind of girl, Zoey sees right through Olivia's tricks. What starts as verbal sparring between the two changes into something different, however, as they share their deepest insecurities and learn they have a lot in common. Olivia falls for Zoey, believing her brother could never get serious with her. But when Liam confesses that he's in love with Zoey, Olivia has to decide who deserves happiness more: her brother or herself?