College freshman and devout Christian Josh Wheaton has his faith challenged on his first day of philosophy class by the dogmatic Professor Radisson. Radisson begins class by informing students that they will need to disavow, in writing, the existence of God on that first day or face a failing grade. As other students in the class begin scribbling the words "God Is Dead" on pieces of paper, Josh find himself at a crossroads, having to choose between his faith and his future. Josh offers a nervous refusal, provoking an irate reaction from his smug professor. Radisson assigns him a daunting task: to prove God's existence by presenting well-researched, intellectual arguments and evidence over the course of the semester, and engage Radisson in a head-to-head debate in front of the class. If Josh fails to convince his classmates of God's existence, he will fail the course, hindering his academic goals. With almost no one in his corner, Josh wonders if he can really fight for what he believes. Can he actually prove the existence of God? Wouldn't it just be easier just to write "God Is Dead" and put the whole incident behind him?
Rated PG by the Motion Picture Association of America for thematic material, brief violence and an accident scene.