A documentary tells the story of how the cult of Divine Mercy in a very short time became the most rapidly developing and spreading Catholic cult in the world. The film constitutes a remarkable testimony to the work of God’s grace in people’s lives. It focuses not only on Faustina Kowalska and the worshippers of Divine Mercy but also invites all viewers on a sort of pilgrimage following the footsteps of God, who chooses what is small, what is humble and what is insignificant in the eyes of the world, to accomplish a work that encompasses the entire world.