A busy night at an elegant restaurant. Minutes later a gunman opens fire. Thirteen people are killed and dozens more wounded. At least the culprit seems clear. ... » 

A busy night at an elegant restaurant. Minutes later a gunman opens fire. Thirteen people are killed and dozens more wounded. At least the culprit seems clear. But Lieutenant Decker, in charge of the investigation, needs to understand what motivated the act. And some things don't quite add up. «