Senecus needs to curb his impulse to kill.

Since becoming immortal after the destruction of the Roman Ninth Legion he's kept his secrets. Including the bad habit of killing vile humans.

Now... he wants to be a better man.

Senecus longs to reconnect with his Native American family yet can't risk exposing them as shapeshifters.

To curb his impulses... and the boredom that comes with the monotony of eternal life... he joins Michael, the Church's top assassin, in a hunt to chase down monsters.

Battling a great serpent. Running down a rogue jinn. Eliminating vampire assassins. With each new death-defying adventure Sen begins to realize he's not just saving humanity... but his own tarnished soul.

Little does he realize, his efforts to be better may just cost his partner, Jo, her life...