After years working his beat under dreary skies, early cognitive decline is starting to drag on Detective David Williams. 

When a serial killer the police nickname ‘Flyboy’ learns of Williams’ checkered past, the unusual crime scene signatures become increasingly cryptic, leading Williams to one final encounter with a man who murdered his family two decades ago.

Now Detective Williams must come to grips with his own past transgressions while exercising his memory to keep up with the complex demands of the most gruesome and grisly foe of his career.