War of Resistance against Japanese Aggression period, somewhere in North China. An arsenal of the Eighth Route Army suddenly exploded. Minister Zhou (Park Ke) of the Ministry of Security concluded that it was the enemy's doing, and urgently ordered Wang (Pang Xueqin) of the Reconnaissance Department to investigate immediately and send troops to search and track. On the way to search, Wang found a body and two knives near an ancient temple. Zhou Dachen thinks there are many objects in the ancient temple. He arranged for Wang to take him into the temple for reconnaissance on the grounds of illness. Strangely, there is only one old monk and one young monk in the temple.