Russian spy Natacha is sent to Lyon by her surly superior to retrieve mysterious blueprints that would enable air traffic to double. The engineer responsible, Bertrand, has hidden these invaluable plans behind a painting in the apartment of his semi-serious girlfriend Gaby.
| Actor | Role |
|---|---|
 Olinka HardimanNatacha, l'espionne | Natacha, l'espionne |
 Gabriel PontelloBertrand, l'ingénieur | Bertrand, l'ingénieur |
 Jean-Pierre ArmandNot listed | Not listed |
 Laura ClairSolange | Solange |
 Éric DrayDaniel | Daniel |
 Cathy MénardGaby | Gaby |
| JJohn OuryNot listed | Not listed |
| DDiane SuresneNot listed | Not listed |