A journey through space and time, beginning in the ninth century AD and continuing well into this century's echo of Cyril and Methodius' mission. Why is their work so significant to all Slavic nations in crucial moments of their histories, being relevant even today? Who is St Methodius: an assistant and co-worker of his younger brother Constantine Cyril the Philosopher or is he the real Baptist of Bulgarians, Slovaks, Czechs and Poles? Researchers from different countries, children and artists, custodians of churches and legends are searching for answers in this journey following in the footsteps of the Holy Brothers and the letters invented by them.