Summary

Lena and Ethan have lived through the day that they had been dreading for months, Lena's sixteenth birthday, but not without some sacrifices. With Macon's death, Lena is depressed and lost, and there doesn't seem to be anything that Ethan can do to help her, despite his own experiences with grief. Then Lena begins pulling away and taking risks, and Ethan, still not aware of what really happened to him the night of Lena's birthday, can't understand why. So he digs deeper into Caster lore and his mother's research to look for a way to save Lena and what they have before it's too late. But once you've entered the Caster world, you can never go back, and some secrets Ethan uncovers will put him and everyone he loves in far more danger than he can imagine.