Catherine is one of the leaders of a criminal organization who is in charge of several other female spies. Her organization has kidnapped a Professor Goodwin, who has developed an electronic ray that can counter any aeriel attack.
In one scene, Catherine puts on a fingernail laced in poison, and scratches a rival female spy who is laying at a beach. The girl dies within seconds of the scratch.
The organization is taken down by CIA Agent Sigma (Jack Taylor). At the end of the film, Catherine engages in a catfight with another female spy. In the tussle, Catherine is intentionally scratched with her own poisoned fingernail. She is instantly killed.