Adapted from Gu Long's novel "Seven Weapons Jade Knife". Jiangnan Zhu Erye wants to find a husband for his only daughter Zhu Zhu among the younger generation of martial arts. Duan Yu, the son of the Central Plains hero Duan Feixiong, was ordered by his father to bring the ancestral seven-star jade knife to Baozhu Villa to celebrate Zhu Erye's birthday and take the opportunity to propose marriage. Hangzhou's "Wonderful Hand Vimalakirti" Lu Jiuye also brought his son to propose marriage, but unexpectedly, his son Lu Xiaoyun, who was extraordinary in martial arts, suddenly disappeared.