An epic romantic adventure based on the life of Billy the Kid, from his humble Irish roots and his early days as a cowboy and gunslinger in the American frontier, to his pivotal role in the Lincoln County War and beyond.

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…

弗次瓦夫发生一具尸体被缝进牛皮的命案后，一名警探发现有位杀手重现18世纪用来惩罚罪犯的名为「瘟疫」的手段。