Jack, an easygoing grad student, posts on a campus bulletin board: 'Driving to San Francisco for Spring Break. Anyone Want a Ride? Split Gas.' The ad is answered by Oliver, a suicidal freshman, who secretly just wants a ride to the cliffs of Big Sur to jump off and kill himself. As they cruise up the Pacific Coast Highway, Jack makes it his mission to break Oliver out of his own head, while both attempt to conceal their ulterior motives for the trip.
Based on the real life story of legendary cryptanalyst Alan Turing, the film portrays the nail-biting race against time by Turing and his brilliant team of code-breakers at Britain's top-secret Government Code and Cypher School at Bletchley Park, during the darkest days of World War II.
An ex- CIA operative is brought back in on a very personal mission and finds himself pitted against his former pupil in a deadly game involving high level CIA officials and the Russian president-elect.