When a strange man called Ryan takes Bella Stellar away from her home, a city crumbling to ashes, he says it's to hide her from the compelling Aidan Styles and his wishes to start The Mental: a genetically engineered plague to make all people the same. Bella is a chosen Final; a person that can help start it. But anything that starts can stop. So on her dangerous journey of going to nerve-wracking graveyard parties, making murderous friends in camps to hide from Tractions, and fighting her way through her now post-apocalyptic home, Bella will have to take the most dangerous task of all: facing herself. Everyone's a little mental.