Legend of Mysterious Agents.

Lin Yifei, a special agent who catches a criminal group, is shot by the enemy and is put into a republican era. He gets involved in a murder case without even knowing the English language, and joins hands with Chilseonmun, who kills vampires. As the suspicions of Colonel Chan-ming and his subordinate Zhao Yi-shan grow, the girls at Baicheng Normal School keep dying...