Season 1 follows Craig, a low-level angel in heaven whose job is to handle all of humanity's prayers. To prevent the destruction of Earth, Craig and a fellow angel have to find a way to make a miracle happen by helping two humans fall in love.
Season 2 is a medieval tale set during the dark ages, following a group of villagers trying to stay positive in a time of inequality.
Season 3 is set in 1844, following a small-town preacher who teams up with a wanted outlaw and a liberated prairie wife to lead a wagon train west on the Oregon Trail.