Dad has moved out and Mom has checked out, leaving the door wide open for the beautiful, erratic Rachel to torment her "loser, loner" younger sister, Nadine. With her family in full meltdown mode, Nadine is alone, trying to cope with Rachel’s increasingly unpredictable moods. Friendless, but determined to turn her life around, Nadine meets Anne, who introduces her to field hockey and to her hot twin brothers, Matt and Cameron.

As Nadine’s star begins to rise, however, Rachel plots to bring her back down, and the tension ratchets up when Rachel starts dating Matt just as Nadine is getting to know Cameron better. When Matt’s interest starts to fade, Rachel goes into overdrive. Is Nadine ready to risk it all in a final showdown with her sister?