Donner Lake is famous for its dazzling waters, dramatic mountains, and the travelers trapped there long ago who did unspeakable things to survive. But for lonely Nora Sharpe, Donner was where a girl named Grace glided into her life one night and exploded her world. After that, every summer, winter, and spring break, Nora, her brother, Wesley, the enigmatic Grace, and their friend Rand left behind their real lives and reunited at Donner Lake. There,...