Quentin Jacobsen - Q to his friends - is eighteen and has always loved the beautiful and edgy Margo Roth Spiegelman. Nine years ago they discovered a dead body together but now, at their Central Florida high school, Q's a nerd while Margo is uber-cool.

One night before graduating, Q is basking in the predictable boringness of his life when Margo persuades him to join her in some midnight mayhem and vengeance... and then vanishes. While her family shrugs off this latest disappearance, Q follows Margo's string of elaborate clues - including an unnerving poem about death.

Q's friends, Radar, Ben and Lacey help with the search, and a post for a website turns Margo will be in a certain location for the next 24 hours only. They drive through the night, racing against the clock. Is Q ready for what he might find?