Hannah MacLaren has grown up between two worlds: scraping by happily with her single; working mum and avoiding the Maryland upper crust in the next town over; where her wealthy cousin and best friend Sophie lives. The plan is to get out: Hannah from paycheck-to-paycheck life; and Sophie from the cosseted world she doesn't fit into. But just before junior year begins; something goes horribly wrong. Sophie overdoses at a party; leaving behind a shocked community and bereft best friends. As the haze of grief begins to clear; Hannah teams up with Sophie's other best friend; Gabi; to find out what happened that fateful night. Someone gave Sophie oxycodone. Someone knew what was going on. And Hannah will not stop until she has uncovered the truth.