Seventeen-year-old Megan Allen has been jumping from friend group to friend group in her high school, trying on identities like outfits. Nothing ever seems to fit--until she meets LC, the adventurous, charismatic girl who appears at her favorite coffee shop one day like magic. Finally, Megan feels like she's becoming the person she's meant to be: someone like LC.

On the night of their friendiversary, what was supposed to be a bonding experience ends in a waking nightmare. Suddenly, Megan is no longer herself. Too late, she realizes that LC has secrets--dangerous ones. Betrayed by her best friend, thrust into another girl's life, and targeted by LC's enemies, she must claim what makes Megan Megan to get her life back . . . or die trying.