Anna Tredicesimo, wife of Luigi Tredicesimo of Santa Ninfa (Trapani), introduces herself to the private investigator Lionel Lionelli and instructs him to recover some red briefs, purchased by her jealous husband in Paris, and lost by her during a loving meeting with the heartthrob fetishist Gianni Agazzi. Lionel, recommended by his friend ten. Sheridan, begins the research and chases the panties from Agazzi to Lola Lola Bis, a stripper, and from this to Iolanda, Ennio's girlfriend, member of Hell's Angels. Lionelli, a bungler by nature, finds the path difficult and also dangerous because, as he will learn very late, a microfilm with a secret chemical formula is hidden in the briefs and, consequently, his steps are constantly followed by men of the boss Goran , master of Titan.
| Actor | Role |
|---|---|
 Oreste LionelloLionel Lionelli | Lionel Lionelli |
 Ubaldo LaySheridan | Sheridan |
 Elena VeroneseElena | Elena |
 Aldina MartanoLola Lola bis | Lola Lola bis |
 Orchidea De SantisAnna Tredicesimo | Anna Tredicesimo |
 Giacomo FuriaPolice commissioner | Police commissioner |
 Claudio GoraGoran | Goran |
 Carla ManciniCloak-room attendant | Cloak-room attendant |
 Roberto MessinaNot listed | Not listed |
 Fulvio MingozziGoran Henchman | Goran Henchman |
 Paola SenatoreJolanda | Jolanda |
 Nino TerzoLuigi Tredicesimo | Luigi Tredicesimo |
| FFausto TommeiNot listed | Not listed |
 Bruno AliasMan at the night club | Man at the night club |
 Salvatore BaccaroMan fainting | Man fainting |
 Enzo MonteduroMan with glasses at the police station | Man with glasses at the police station |
 Ines PellegriniSister of Lola Lola bis | Sister of Lola Lola bis |
 Nino MuscoPoliceman | Policeman |