Bill Maher (himself) takes on religion, traveling all over the world to skewer those involved with Scientology, Islam, Mormonism, Christianity and more. He visits the Bible Belt, Wailing Wall, Salt Lake City, Via Dolorosa, Stonehenge, the Vatican, mosques, the Holy Land Experience Park in Florida and other places. He even visits a gay bar for Muslims. He conducts many interviews with both followers and leaders from these religions. He is part Jewish and part Catholic, but totally agnostic and is filled with incredulity about those who follow any religions. Bill Maher wants people to explain him what and why they believe certain things.