The document provides an overview and summary of the plot of the book "Crank". It describes how the main character Kristina transforms into her alter ego Bree after experimenting with crystal meth. As Bree, she engages in risky behaviors like taking drugs, drinking, and putting herself in dangerous situations. This leads to a major mistake by Bree that forces Kristina to make a life-changing decision. The story takes place in Reno, Nevada and Albuquerque, New Mexico and focuses on themes of addiction, drug abuse, parental and family conflicts, and teenage pregnancy.