Nell knows a secret about her perfect, beautiful sister Layla. If she tells, it could blow their world apart.

When Nell and Layla were little, Nell used to call them Nellayla. Because to Nell, there was no difference between where she started and her adored big sister ended. They're a unit; divorce made them rely on each other early on, so when one pulls away, what is the other to do? But now, Nell's a freshman in high school and Layla is changing, secretive. And then Nell discovers why. Layla is involved with one of their teachers. And even though Nell tries to support Layla, to understand that she's happy and in love, Nell struggles with her true feelings: it's wrong, and she must do something about it.