A Valentine's Day dance at Greg's middle school has turned his world upside down. As Greg scrambles to find a date, he's worried he'll be left out in the cold on the big night. His best friend, Rowley, doesn't have any prospects either, but that's a small consolation.

An unexpected twist gives Greg a partner for the dance and leaves Rowley the odd man out. But a lot can happen in one night, and in the end, you never know who's going to be lucky in love.

Odd, considering he didn’t drink. Why this bottle? And why those words? And why was a three-digit number painted on the wall by the killer? And, most importantly, which of the man’s many, many enemies did the deed?

Baffled, the police are forced to bring in Private Investigator Daniel Hawthorne and his sidekick, the author Anthony, who’s really getting rather good at this murder investigation business.

But as Hawthorne takes on the case with characteristic relish, it becomes clear that he, too, has secrets to hide. As our reluctant narrator becomes ever more embroiled in the case, he realises that these secrets must be exposed � even at the risk of death�