Helios, a most wanted criminal in the global radar, has stolen the South Korean military’s latest mass destruction weapon: a handheld nuclear device DC8 and 16 uranium spheres. An underground trading of the stolen weapon is due to take place in Hong Kong. Chinese envoy Song An, Hong Kong’s Counter Terrorism Response Unit Chief Inspector Lee Yin-ming and South Korean weapon expert Choi Min Ho are all gathered in Hong Kong on a mission to recover the weapon. Physics professor Siu Chi-yan joins the team as consultant.