In “Muzzle: City of Wolves,” Jake Rosser (Eckhart), haunted by PTSD from his days as a K-9 officer, endeavors to lead a peaceful life with his family and retired K-…

内森·凯恩（杰克·奎德 Jack Quaid 饰）过着普通的生活，而在平常的外表之下，他有着不寻常的病症——感受不到疼痛。从身上拔下一颗子弹头、被人拳打脚踢、把手放进滚烫的水中、徒手接刺刀……这些致命伤对凯恩来说都不痛不痒，而意外失…