Rick goes to Cheznik, Czechoslovakia to help rescue scientist Anton Ledovik from the communists. He goes to Paul Jaraslaw for help when someone tries to kill him, only for Paul to turn out to be a communist agent; Rick kills Paul and returns Anton to the USA safely.; Rick goes to Iowa to find out how communist agents are spreading an insect to crops, planning to use an insecticide to poison US plants. Rick discovers a trust farmer is really a communist agent and shoots his crop duster plane from the sky, ending the scheme.; Rick pretends to have gone anti-US so he can win the confidence of Soviet agents in England. The entire time he works with the communists, he finds their member Grills wathcing him. Finally, Scotland Yard catches the gang and Rick finds a file on all the agents, while Grills turns out to be another undercover man working for the Yard.; Chinese-American agent Lee Chan ventures into Chinese territory to rescue Po Tong, a defector from the military. Eventually, he must remain behind to help an old farmer smuggle Tong to safety, while Chan hopes he may eventually evade capture.