Duplicity(2009)

Two romantically involved government operatives Claire Stenwick and Ray Koval team up to manipulate a race between opposing corporations to corner the market on a medical innovation that will reap huge profits and allow them to lead an extravagant lifestyle together. They find themselves on opposing sides as corporate spies; however, as they each try to outdo the other, neither one can decide how far to trust the other in this high-stakes game of cat-and-mouse.