瑞典某市国王路公寓发生一起入室凶案，弗兰克•瓦格纳出于自卫错手杀死持枪入室的歹徒，瞬间被推向舆论的风口浪尖。他带着妻儿找到了GSI的特警约翰•福尔克寻求帮助。与此同时犯罪团伙头目推测弗兰克可能是潜伏在圈子里的卧底，找到平素与弗兰克有贸易合作的商人赛斯，恐吓其散布消息重金悬赏捉拿弗兰克的人。紧接着一名GSI女警员无故被枪击致使昏迷，更令案件陷入重重谜团。警察当局威胁弗兰克接受不平等契约，不然便要令他成为全国通缉犯。弗兰克愤怒出逃。随着五年前一宗击毙犯罪分子的案件重新被想起，真相渐渐浮出水面，人们口中的杀人嫌犯弗兰克原来真是为警察当局兢兢业业的卧底，也就是传说中的“代号丽莎”，可他终究难逃亡命生涯……

　　瑞典某市E6区发生运钞车劫案，劫匪穷凶极恶，组织严密，其背后俨然有一个庞大的恐怖犯罪组织暗中操纵。为了追查运钞车的下落，对抗无法无天的犯罪组织，国际警察机构命令特别调查组GSI追查此事，连阔别警队15年之久约翰·福尔克（雅克布·艾克伦德 Jakob Eklund 饰）也回归部队。他们将目标锁定在埃里克·达沃达（派勒·博兰德尔 Pelle Bolander 饰）等臭名昭著的犯罪头目身上，跟踪调查与他们有关的蛛丝马迹。 　　而在这一过程中，城中的劫案愈演愈烈，犯罪分子们似乎与GSI展开了一场充满枪声血光的竞赛。精英云集的GSI面临巨大的挑战，残酷的正面对抗在所难免……

It follows 16-year-old Erik, who is used to violence both at home and in the schoolyard. After being expelled from his school in Stockholm due to his violent behavior, he is transferred to the boarding school Stjernsberg. It is his last chance to continue his education and break with his previous life, but at Stjernsberg, the violence is worse than at home. While there, he also engages in a forbidden love relationship with Marja, a member of the kitchen staff.