"God's Not Dead" is a movie with a story about a boy named Josh who is studying at college, and he believes in God, but his philosophy professor is an atheist and doesn't agree with him. The professor asks the class to write a paper saying "God is dead," but Josh doesn't want to do that because he believes in God. So, he decides to prove that God is alive and exists, using evidence and reasoning. He does this by talking to his professor and his classmates, and he also gets help from other people, like a pastor, a lawyer, and a blogger.
The movie tries to show that it's okay to believe in God and that you don't have to be afraid to express your beliefs. It also tries to show that even though there are people who don't believe in God, there are also many people who do, and they have good reasons for doing so. The movie also tries to show that there can be conflicts between people who believe in God and people who don't, but that doesn't mean that they can't have respect for each other and have a conversation about their beliefs.
Overall, the movie is about faith, belief, and standing up for what you believe in, no matter what other people say.