As Leo's replacement Thomas Chamberlain arrives Nikki investigates the murders of Rachel Freedman, shot in the head, and her little autistic son Nathan, who was poisoned. Nikki rejects policewoman Anne Burchett's theory that Rachel killed them both but is perturbed when an impostor, claiming to be Rachel's sister, visits the morgue. At the same time the disfigured corpse of Eva Liron is discovered, killed with the same poison as Nathan. She had been the nanny to French hot shot footballer Isaac Dreyfus and was planning to blackmail him over a sex tape of them both. Jewish Isaac is a controversial figure due to his anti-Muslim sentiments but he denies ant part in the murders. Then another victim, Isaac's agent Mousa, is discovered dead.
铁血大旗门惨遭灭门之祸，在掌门的带领下，铁中棠（杜淳 饰）、云铮（崔林 饰）一行人侥幸逃脱，他们将深仇大恨埋藏在心底，一晃眼就是十年。十年后，掌门决心开始他的复仇大计，哪知道自己的大儿子云铿却爱上了死敌之女冷青霜，震怒的掌门下令处死云铿，此举却使大旗门再次成为了众矢之的，而云峥和铁中棠更是牵连其中，被逐出了师门。 之后，落难的铁中棠邂逅了美丽温柔的水灵光（秋瓷炫 饰），两人坠入了爱河。与此同时，铁中棠还习得了大旗门的绝世剑法，武功不可同日而语。之后，铁中棠带着水灵光重出江湖，仗剑天涯，掀起了一股腥风血雨。
