The film revolves around an internationally mixed team of high-profile heisters specializing in gold thefts, led by Albert the Professor and his seductive lover Giorgia.

The other six men - Adolf, August, Aldo, Anthony, Alfonso and Alfred - posing as sanitation workers and equipped with a truckload of gadgets, enter the sewer system right beneath the bank.

Avoiding the intricate security system, they drill into the vault, right into the underside of the bullion stack, and steal six tons of gold while leaving the outermost layer intact to conceal their heist.

A radio ham intercepts their transmissions and informs the police, but Interpol, who is on the team's trail, dismisses the case after a superficial check in the vault.

The chase ends in front of the Colosseum, where the six intercept the transport; but August accidentally disengages the handbrakes, causing the truck to roll into the open and crash, spilling the bullions to the feet of a crowd of greedy pedestrians.