Who killed Avery? All the clues point to one person; Avery is sure of it. Of course, she's been wrong about almost everything so far. As she searches for clues with her Vessel and Clark Daniels, she realizes that some things aren't adding up. Will Avery and her friends be able to find out who the killer is or are they headed for another dead end? And how exactly do you accuse someone of murder? Things are bound to get awkward as the summer comes to an end and Avery is forced to look at people differently than she ever has before.