"This is a film for true lovers of the medium, who recognize cinema as a visual medium, not a conduit to storytelling." - As a scriptwriting major, this makes my head spin. 

Here is the plot for the first half of the film, from All Movie Guide:

"Commissioned to paint the interior of the Vladimir cathedral, Andrei Rublev (Anatoli Solonitsyn) leaves the Andronnikov monastery with an entourage of monks and assistants, witnessing in his travels the degradations befalling his fellow Russians, including pillage, oppression from tyrants and Mongols, torture, rape, and plague. Faced with the brutalities of the world outside the religious enclave, Rublev's faith is shaken, prompting him to question the uses or even possibility of art in a degraded world. After Mongols sack the city of Vladimir, burning the very cathedral that he has been commissioned to paint, Rublev takes a vow of silence and withdraws completely, removing himself to the hermetic confines of the monastery." 