The film is set in early 11th century China during the reign of Emperor Renzong of the Song Dynasty. The emperor neglects state affairs and indulges in personal pleasures, while the government sinks into corruption and war continues to rage on at the borders of the Song Dynasty. The Song Dynasty is being invaded by the armies of the rival state of Western Xia. Yang Zongbao is the last man standing in the Yang clan, a family of generals who have dedicated their lives to defending the Song Dynasty from foreign invaders. He apparently dies in battle tragically when the treacherous Imperial Tutor Pang refuses to send reinforcements to aid him. Yang Zongbao’s widowed wife Mu Guiying leads the other widows of the Yang clan into battle to continue the legacy of their husbands.

Details the workings of a mysterious assassination organization, (codenamed: Naked Weapon), led by its globally feared and master assassin, Fiona Birch. It essays the modus operandi of Fiona where she assassinates a crime mob boss and his mooks. A trained assassin, she violently breaks the spine of a fat mob boss using the infamous Deadly Spine Rip technique.Soon a police detective who has been searching for Charlene for ever since she disappeared but soon an mysterious figure who has a personal vendetta with Madam M and her syndicate appears and both Charlene and Katherine must use the skills they have learnt to defend themselves.This movie began it’s life as a follow up to Wong Jing’s cult classic Naked Killer but as with most of Jing’s projects, the finished product is different to what was originally conceived.