Five years ago, a tragic murder-suicide rocked the small town of Fairview, Connecticut when popular schoolgirl Andie Bell was brutally murdered and her boyfriend, Sal Singh, was accused before seemingly taking his own life. But seventeen-year-old Pippa is convinced that the real killer is still out there. She befriends Sal's younger brother, Ravi, and launches an investigation under the disguise of a school project. Unfortunately for Pip, each interrogation puts Pip in a greater danger, yet she still persists. She finds evidence that Andie was selling drugs to students, including Max Hastings, and was having an affair with Mr. Ward, history teacher and father of Cara Ward, Pippa's longstanding best friend.Pippa finds out Mr. Ward pushed Andie into a desk in a moment of fury. When Andie went missing, Mr. Ward thought he had killed her, so he framed Sal and murdered him while making it look like a suicide. A few days later, Mr. Ward saw a girl walking through the street and mistook her for Andie. Pippa discovers that the girl wasn't Andie, but Becca, Andie's sister. Becca confesses that Max Hastings had drugged and raped her. Becca soon found out Andie didn't care about her. In anger and desperation, Becca pushed Andie. Andie had a serious concussion and vomited, unable to turn herself over, and Becca let her die. Becca gives Pip drugged tea and drags her into the woods to choke her to death, but Ravi is able to save Pippa. In death, Sal is made innocent.