Italian reporter Luciano Morelli (Leonard Mann) is taking an express train to Greece from Istanbul with his girlfriend, Swedish up-and-coming model Ingrid Stelmossen.

However, a young bisexual singer and entrepreneur, Ulla, hears from her boyfriend, Raul, that he has one of the killer's gloves and is planning an extortion.

At the arranged meeting place, the killer leaves the money as a lure for Raul, then cracks his head with a wooden post and slashes his throat.

Luciano retcons with an acquaintance in organized crime, where the guy translates a local paper saying he's the prime suspect in the train murder.

They can't crack the safe until Ingrid opens it by accident, but the killer murders Teodorus in the house and flees, leaving the trio to find him dead.

The young safe cracker arrives, revealing she wore a mask made from Ulla's bust to catch the killer in the trap.

The woman, Ida Tuclidis, wanted to be more excited than her unsatisfactory husband, so she ran with a crowd of drug traffickers.

The young safe cracker blabs about the burglary, so Luciano warns her about the cops present; the turnout in the end is left ambiguous.