The banker had taken the money from another '00' and is about to tell Bond who the agent's assassin is when he himself is killed by a knife from his secretary, the Cigar-Smoking Woman.
James uses a flash bang grenade disguised as his handgun to disable the banker's men and ends up holding the banker at gun-point. The banker, however, plans to have James killed. In Bilbao, capital of the Basque Country in Spain, James Bond, meets with a Swiss banker to recover a large sum of money.
