Savage plants have gained sentience and waged war against humans. To defeat them, world governments will destroy them with nuclear bombs after humans have disappeared into underground bunkers to wait out the holocaust. Addison has five hours until the bunkers seal themselves. And her little brother is missing.

To find her brother Damien, Addison must brave The Forest, a labyrinth of all remaining plant life, without the help of her traumatized mother or the father who abandoned them. But finding Damien won’t be as easy as bringing him safely home, and confronting the plants won’t be as easy as confronting the lie Addison believes about what really fractured her family.