Arthur Simon Simpson is a small-time crook biding his time in Greece. One of his potential victims turns out to be a gentleman thief planning to steal the emerald-encrusted dagger of the Mehmed II from Istanbul's Topkapi Museum.

• Filmways Pictures
• United Artists
• Melina Mercouri
• Peter Ustinov
• Maximilian Schell
• Robert Morley
• Jess Hahn
• Gilles Ségal
• Akim Tamiroff
• Titos Vandis