In the summer of 1919, the Attorney general, a. Mitchell Palmer, appoint an agent and Flyn, an expert in security, to investigate a series of explosions. Flyn is a clever and honest agent. Lives in italian immigrant neighborhood, around all those accused of conspiracy. Suspicious packages appear increasingly more often at the doors of politicians and businessmen. Shortly after, Flynn realize that behind these attacks, there is a group of anarchists, Flynn is attracted to unwittingly in a world of secrets. Manages to discover the truth but it was the truth we wanted authorities?