He's doing the holiest work—murder.

When LAPD Homicide detective Marcy Kendrick and her partner Angel Reyes investigate the bizarre death of a drug dealer in an abandoned warehouse, they discover he was waterboarded—with baptismal water.

It isn't long before the killer strikes again. This time the victim is a young woman. Her hands and feet were bound, she was decapitated, and her heart was cut out. Traces of baptismal water are found in her wounds.

As the death toll continues to rise, it becomes clear the killer is on a religious mission. It's the kind of sensational case the press loves, and they make the most of it, stirring up a frenzy, dubbing the killer the Templar.

With the investigation under intense public scrutiny, Marcy's boss demands a quick resolution. But that's easier said than done because there doesn't seem to be any connection between the victims.

Marcy finds herself hunting a killer who thinks he's on the side of the angels, with no idea where he'll strike next. Can she stop the Templar before he kills again?

Contains mature themes.