Shazam!: Power of Hope is a tale of a superhero using his powers in the most human of ways: to instil hope in the hearts of children. When Billy Batson, Captain Marvel's adolescent alter ego, receives a letter from a terminally ill boy in the Children's Hospital of the city, he decides to spend a few days in the ward. A kid at heart, Captain Marvel tries to add some joy to the children's lives by taking them on flying escapades, and filling them with awe stories of his own.