Josie, Perri, and Kat have been best friends since third grade—the athlete, the drama queen, and the popular beauty. Growing up in an affluent suburb of Baltimore, they enjoy privileges many teenagers are denied. But on the final day of school one of them brings a gun with her. And when the police break down the door of the high school girls' bathroom, locked from the inside, they find two of the friends wounded, one of them critically . . . and the third girl is dead.From multiple-award winner Laura Lippman, one of the most acclaimed authors of crime fiction writing today, comes a tale of secrets, friendship, and betrayal that illuminates a dark and chilling event with clarity and empathy.