He’s a secret weapon against evil. But can he defeat the monster lurking within?

Quinn Carter is in a good place. Along with his half-angel girlfriend, the loyal half-demon teen thrives as he works with supernatural friends to fight ongoing threats. So when the Greek gods seek help, he faces off against a demigod craving world domination.

Attacked by a demon king, Quinn survives when aid appears from a dubious ally. But when a blood-sucking enemy makes a devastating move, the teenager finds himself plunged into a clash between light and dark.