Five circles of episodes built around the characters of Diagoras Vartanis, a colonel of the Counter-Espionage Service of Greece during WW2, Christina Psachou, his sister, and lieutenant Hector Psachos, his brother-in-law. in the first segment Italian spies kidnap Christina's child and force her to collaborate with them. In the second segment Hector Psachos has to confront a dangerous look-alike from Albania. In the third segment Vartanis pretends he is a traitor, in order to trap German spies. In the fourth segment the Nazis torture Virginia Dervou, an anti-fascist Greek woman. In the final segment the heroes move to the Middle East.