They slaughtered his family.
They left him broken.
Now he grips with blood and doesn't let go.

Eighteen-year-old Jasper Vale watched his family get butchered on Christmas night. Left for dead, he learns a forbidden jiu-jitsu technique—Veinlock—that warps his body and mind into something monstrous. Every grip he lands twists his anatomy. Every kill feeds a darker hunger.

From icy dojos to blood-soaked back alleys, Jasper hunts down each killer with brutal precision. But the deeper he digs, the more he uncovers about a cult called The Gospel of Redlock—and their plan to unleash him.

Revenge mutates into obsession.
And his scarlet grip might choke out what's left of his soul.