Nick Burkhardt 本來只是個普通警察，一直到他知道自己是格林後裔─擁有悠久歷史的守護者家族，開始背負著維持人類和他界妖獸間平衡的任務。第三季結尾的高潮讓觀眾更加興奮期待第四季的劇情發展。Nick失去格林傳人的力量後將如何調適呢？身中三發子彈的Renard隊長的命運又將如何發展呢？Juliet會發現Nick(意外的)背叛嗎？整季劇情發展絕對會非常的「格林」風格，敬請期待！
Nick Burkhardt was just your average cop, till he learnt that he was descended from a long line of guardians known as “Grimms”, entrusted to maintain the balance between humanity and out-of-this-world creatures known as the Wesen. Season 3 ended on a major high and we can hardly contain our excitement for what’s in store in season 4! How will Nick adapt without his Grimm powers? What’s Captain Renard’s fate after taking three bullets to the torso? Will Juliet find out about Nick’s (accidental) betrayal? The road ahead seems to be looking ‘Grimm’ indeed!