A departing professor gathers his closest colleagues for an intimate farewell, but the night takes an unexpected turn when he shares a stunning secret about his past. As the conversation unfolds, skepticism and curiosity collide, challenging everything they thought they knew about history, science, and belief.

14,000-year-old "Man from Earth" John Oldman, now teaching in northern California, realizes that not only is he finally starting to age, but four students have discovered his deepest secret, putting his life in grave danger and potentially destroying the world's most popular religion.