Ray Steppin, a small-town sheriff in the mountains of Syzygy County Alaska is awakened early one morning with a hangover of steep proportions. He's summoned to the gruesome crime scene where a bevy of bodies have been found at a remote cabin; and one is still breathing. As the investigation deepens and night begins to fall, it becomes more and more clear that what Ray and his deputies (and the local coroner/priest) are up against isn't natural and that nothing is what it seems.
When the magic powers of The Tablet of Ahkmenrah begin to die out, Larry Daley (Ben Stiller) spans the globe, uniting favorite and new characters while embarking on an epic quest to save the magic before it is gone forever.
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.