A wealthy, spoiled young man, about to be married, arranges for an illicit liaison with a mysterious French girl who calls herself Yvonne. He is accosted in his Brighton hotel room by a man who claims to be a private detective in the employ of Yvonne's husband.
| Actor | Role |
|---|---|
 Edgar LustgartenSelf | Self |
 Derrick SherwinSimon | Simon |
 Imogen HassallYvonne Purvis | Yvonne Purvis |
| EEdward AtienzaWilliam Purvis | William Purvis |
 Peter BarkworthRobbins | Robbins |
 Cyril LuckhamMr. Lawson | Mr. Lawson |
 Geoffrey ChaterMr. Soames | Mr. Soames |
| KKenneth MacKintoshBank Manager | Bank Manager |
| LLyndall GoodmanSecretary | Secretary |
| RRobert LankesheerJudge | Judge |
 Michael NightingalePrescott | Prescott |
 June SalterReceptionist | Receptionist |
| AAnthea WyndhamJulia | Julia |