"Kit, a seventeen-year-old moral nihilist serial killer, chooses who to kill based on anonymous letters left in a secret mailbox, while simultaneously maintaining a close relationship with the young detective in charge of the murder cases"--

While a serial killer stalks his small Georgia town, sixteen-year-old Henry tries to find the truth about the terrible accident that robbed him of his mother and his memories, aided by his friend Justine but not by his distant father.

After high school graduation, Mac focuses on finding the serial killer who murdered his best friend the previous summer, while working through his own feelings for the deceased.