Mu Bai, a top student at a military academy, accidentally transmigrates to the Central Hebei Plain in 1938.
After witnessing the Japanese invaders massacre an entire village, he uses modern sniper tactics to kill a Japanese major.
Ding Bao, the female leader of a guerrilla unit, rescues him, but doubts his claim that he can "take an enemy's head from a kilometer away," calling it madness.
When Mu Bai uses homemade explosives to destroy a blockhouse and a frequency-hopping radio to thwart a Japanese encirclement, Ding Bao is finally convinced.
