When the mutilated body of a young woman is discovered in the Santa Monica Mountains, LAPD Detective Jessica Allen knows she’s seen this MO before – two and a half years ago on the other side of the country.

A sadistic serial killer has been operating undetected for a decade, preying on lone female drivers who have broken down. The press dub the killer ‘the Samaritan’, but with no leads and a killer who leaves no traces, the police investigation quickly grinds to a halt.

That’s when Carter Blake shows up to volunteer his services. He’s a skilled manhunter with an uncanny ability to predict the Samaritan’s next moves. At first, Allen and her colleagues are suspicious. After all, their new ally shares some uncomfortable similarities to the man they’re tracking. But as the Samaritan takes his slaughter to the next level, Blake must find a way to stop him … even if it means bringing his own past crashing down on top of him.

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