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-9 companion, Socks. But the tranquility quickly dissolves when a ruthless gang targets them in a brutal attack. Determined to protect his loved ones, Jake and his new K-9 partner Argos delve into a violent underbelly of crime where Jake confronts corrupt officials, uncovers a perilous drug trafficking ring and battles his own inner demons.

　　每個學校都有很多故事，從新生入學到畢業，一屆又過了一屆，然而那些建筑和房屋仍然留在原地，有些人帶著難忘的回憶離開，而那些回憶可能永遠也不能忘記……

　　著名電臺女主播蕭瀟雅（辛芷蕾 飾）在結婚前七天，因親眼目睹名作家未婚夫李明軒與前女友許嘉雯（何佩瑜 飾）偷情，蕭蕭雅忍受不了背叛出軌的傷痛而自殺，幸被搶救復生，男友李明軒卻墜樓身亡……是自殺還是他殺還沒有揭曉真相，李明軒的前女友許嘉雯卻又死于非命，李明軒的弟弟李明炎（張 哲瀚 飾）一直對哥哥的死覺得離奇，經調查發現偷情背叛事件出自許嘉雯和薛威（于毅 飾）策劃的，在真相還沒有大白前，薛威也相離奇死亡……誰是幕后真兇？是陰陽兩隔的戀人的瘋狂復仇？是橫刀奪愛者的殺人滅口？還是宿命在愛情開始的一刻早已注定？