Modesty Blaise, a secret agent whose hair color, hair style, and mod clothing change at a snap of her fingers is being used by the British government as a decoy in an effort to thwart a diamond heist. She is being set up by the feds but is wise to the plot and calls in sidekick Willie Garvin and a few other friends to outsmart them. Meanwhile, at his island hideaway, Gabriel, the diamond thief has his own plans for Blaise and Garvin

This espionage thriller represents a landmark in spy movies introducing the sly, dry intelligence agent Harry Palmer. The story, centers on Palmer’s investigation into British Intelligence security. He’s soon enmeshed in a world of double-dealing, kidnap and murder and finds a traitor is operating at the heart of the secret service. Will the mysterious ‘Ipcress File’ reveal who the traitor is?