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.
This show isn't for everyone. It doesn't have a laugh track to follow along with. The actors don't give unnatural pauses to allow people to ponder if the line was a joke and audio cues that it was. The jokes are dry and can be missed. They make fun of modern society but in the context of the ancient setting.