ICAC principal investigator William Luk and his colleague Kenny Ching are working together on a smuggling case. While doing so, they accidentally uncover links to a human trafficking ring. The men behind it are King, the head of a terrorist group, and his handler Xiao Zhuoya, and it also involves a number of senior leaders of the Hong Kong Customs and Excise Department. Luk and Ching enlist the help of the Chief Justice of Asia, Emma Pang, who was invited to Hong Kong and is secretly being protected by JFIU member Paul Liu...