Three Black Triangles
1/1/1977
Imdb: tt0339127
Tmdb: 839185
Popularity: 1.033
Vote: 7/10 (1)

The Public Security Bureau intercept a telegram notifying foreign agents to retrieve the "110 secret". Shi Yan, head of the Reconnaissance Section, starts a campaign of counter-espionage, but one of his agents is soon killed on board a train.