Cam has been through hell and back. He was kidnapped and torn apart by scientists while the human government turned a blind eye, and he doesn't think he will ever recover. How could he? Even now that he's free, his pain and fear keep him captive.Rocco never thought his mate would be one of his patients, but since Cam is related to one of the assassins' mates, he's Cam's doctor first and his mate second, at least for now. He wants Cam to start living again, but he understands how hard it is, since he'd been through something similar.Cam carries his fear, while Rocco carries guilt. Neither of them is sure they'll be able to shed it and make space for love in their life. But when the warehouse where the assassins live is attacked, they'll have to face their worst fear—and hopefully, win the fight.