Didier Formenter, the French scientist, has just put the final touch on an invention that will be able to destroy to destroy any sort of flying apparatus. An international crime gang is very interested in stealing this equipement to sell it to the higher bidder of lawless nations. Menaced, the scientist, who was friends with Nick Carter's father, calls Nick for help. At Nice airport, Nick Carter escapes death, but that night he is unable to stop Formenter's murder. He suspects Bruno, Formenter's adoptive son, and Tonio, the owner of a bar near Formentier's home. Bruno is actually after Formenter's heritage, and for that he tries to kill Catherine, Formentier's granddaughter. Therefore, Nick Carter finds himself against more than a gang, but he will uncover the plots, in time to break every gangster apart.

Thierry la Fronde was a French television series that aired in 1963–66 on the television station, ORTF original script by Jean-Claude Deret. Dubbed into English, it was shown internationally in the 1960s, including in Canada, where it was referred to under the original name, and also as The King's Outlaw. It was shown as well in Poland as Thierry Śmiałek. On ABC in Australia, it was called The King's Outlaw. In the Netherlands, 32 of the 52 episodes were shown in 1967 as Thierry de Slingeraar, as a Netherlands Television Service programme.