Pandemonium is a dystopian novel set in a futuristic society where love is considered a disease called Deliria. To be cured of this disease, people undergo a procedure known as the cure. In the previous book, Delirium, Lena learns to love, realizes that the cure takes away all feelings whatsoever, and narrowly escapes the society, at the cost of her boyfriend, Alex. When the book starts, Lena is switching between the past and the present. In the past, she is found by a group of non cured people called the Invalids. They take her in and teach her how to survive without the comforts of the society. In the present, Lena is undercover in the society and gets captured by another group of non cured people called the Scavengers. She meets a boy named