"When four teens discover the dead body of influencer Summer Cartwright, they must piece together the truth behind her online persona to find out who killed her"-- Provided by publisher.

Social media influencer Summer Cartwright has millions of followers, a newly minted book deal, the coolest friends. And until recently, the hottest boyfriend at her über-elite prep school. Then she goes missing during a Halloween party-- and a post appears on her feed claiming she'll be dead within the next five minutes. Those closest to Summer-- friends and enemies alike-- know it isn't a media stunt. And no filter is strong enough to mask the lies they tell themselves when Summer's body is found. -- adapted from jacket