Claire and Blair were once inseparable since birth. As twins they have spent every moment of their lives together as best friends, but that changes when high school comes and Claire decides she'd rather be popular and Blair decides she'd rather be a wallflower. The two grow apart until one day, Claire discovers that her secret crush, Carter, has a not so secret crush on Blair. Hoping to win Carter's heart, Claire seeks Blair's help and through that the two sisters uncover secret after secret about one another.