Praise the Lord is a pure adaptation of Zacharia's novel 'Praise The Lord', which also has the same title. Joy (Mammootty) is an immensely rich Pala based farmer. He is hardly aware of the life beyond his small town in Pala as he didn't get much chance to explore the outside world.
But a boy and girl, who are in love, change Joy's outlook on life. This forms the plot of the story.