Thom, a genius engineering graduate is interested in the Bank of Spain's safe. The Bank building is more than 100 years old, with no building blueprints available and a security system that includes an underground river that will flood the safe room if their walls are breached. As soon as Thom learns that a legendary lost treasure is going to be held at the bank's safe for just 10 days, he devises, together with charismatic art dealer Walter "Cunningham" a detailed plan to breaking in.