A violent thunderstorm and a bizarre ball of lightning unexpectedly hurl the four-member special operations squad led by Lin Xiao onto an ancient continent plagued by constant conflict. Cut off from modern support, they conceal their assault vehicle and travel light into a perilous primeval jungle. When they encounter the Northern Di barbarians besieging their targets, the elite soldiers use modern weapons and tactics to crush the bandits with overwhelming superiority and rescue Chu Lingyun, the eldest princess of Great Chu.