“Maggie O’Dell, FBI profiler, is working on two cases. One is in Washington, DC where a serial killer is hacking young women to bits and leaving their heads in prominent places. The second case is in Omaha, NE where a priest has been stabbed in the Omaha airport. More priests are found dead and it is rumored that all the dead men were abusive to young men in their parishes. When a computer game called the 'Sin eater' surfaces in which players are allowed to submit names and execute the characters online, Maggie and Omaha detective Tommy Pecola wonder if there is more than one killer. Plenty of action and an ending that feels good but maybe is not as moral as it should be.