Los Angeles' most famous detective has never shown his face.

Hidden behind a weathered horsehead mask, he has solved hundreds of impossible murders, making him both a celebrated investigator and the city's greatest mystery. But when an unknown serial killer begins leaving cryptic messages addressed only to him, the detective realizes someone knows exactly who he is—and may have been watching him for years.

SYNOPSIS:

"Every mystery has a face. His just happens to be a horse."