Vee Bell discovers that her sister's friend Sophie was murdered, a truth she knows because she witnessed the crime while inhabiting the mind of the killer. Vee struggles to navigate her high school life while managing a secret ability that allows her to slide into the consciousness of others during episodes mistaken for narcolepsy. She faces the dual pressure of identifying a murderer who is hiding in plain sight and managing the deteriorating trust of her best friend, Rollins. The narrative unfolds through Vee's perspective, emphasizing the isolation of her condition and the mounting danger as she realizes the killer may be someone within her immediate social circle.

The premise sets up a high-stakes investigation where the protagonist's unique ability acts as both a tool for truth and a source of profound isolation. The genre points to a focus on the psychological toll of witnessing violence through the eyes of an antagonist. Readers likely find the narrative tension centered on the protagonist's inability to communicate her experiences to those around her. The story suggests a blend of typical high school social dynamics with a darker, supernatural thriller element that complicates the standard murder mystery framework.