Cal and Thorn, two Americans, go deep sea diving on the Costa Del Sol and, having brought ashore a fish, proceed to double-cross and kill each other. The fish turns out to be plastic and contains a hundred thousand dollars in notes. The Department team arrive and Stewart and Annabelle pose as a married couple interested in diving to discover the drop-off whilst Jason heads for Madrid in pursuit of the engraver who is making the counterfeit notes.
—don @ minifie-1