Father Jan Kaczkowski—a charismatic clergyman and an ordinary, fallible human being. Marked by an incurable illness, a self-styled "onco-celebrity" who fought for the dignity and humanity of others. *Children's Day*—a diagnosis, childhood memories, and a symbolic birth into eternity. A metaphorical term that, in the film, focuses attention on love: love for others—the sick and the lost—and love for family, for one’s father, and for God. It is also a film about the need to love and be loved. Crafted from previously unseen archival footage, it is an authentic portrait of an extraordinary man.