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.

Cast: Melina Mercouri, Peter Ustinov, Maximilian Schell, Robert Morley, Jess Hahn, Gilles Ségal