Ethan Decker is a specialized “Hunter” for the most secretive agency of the U.S. government, tracking down ruthless international fugitives. But when a renegade assassin kills Decker’s young son, he leaves his unsuspecting wife—to save her from the madman’s threats—and exiles himself to a remote desert in New Mexico. Then one searing day, a former member of Decker’s covert team arrives at his door, shepherding two children. She entrusts them to his protection and leaves without explanation—only to turn up dead a few miles down the road, killed by the man who murdered Decker’s son.

Suddenly the race is on: to reach his ex-wife before the ruthless assassin finds her, and to unlock the mystery behind the two children—innocents who end up as pawns in a dark conspiracy so evil that even this former spy cannot imagine the peril that lies directly in his path.