Sergeant Honma Eiji has been assigned to the Shanghai military police. 
Not long after assuming his new post, he is summoned by Captain Oikawa Masayuki. 
Oikawa orders Honma to conduct an internal investigation and uncover an enemy agent 
who's infiltrated their ranks. As he explains the mission, they hear an explosion...
But how am I going to find a lead?
لكن كيف لي أن أجد دليلاً ما؟
Aber wenn ich irgendeinen
Hinweis finden könnte …
Pero ¿cómo se supone 
que encuentre una pista?
Pero ¿cómo se supone que 
puedo encontrar una pista?
Mais où puis-je trouver une piste ?
Certo, ma come faccio a trovare i primi indizi?
Mas... O que eu devo fazer
para encontrar uma pista?