While restoring an old painting showing a woman and two men playing chess, Julia discovers the text "Who killed the knight" underneath the paint. The owner of the painting tells her that one of his forefathers was killed, the painting might identify the murderer. When Julia's friend is killed she understands that there is more to it. She consults Domenec, a chess genius who reconstructs the game from the painting. With any piece he takes, somebody dies.

A brilliant pianist, a Polish Jew, witnesses the restrictions Nazis place on Jews in the Polish capital, from restricted access to the building of the Warsaw ghetto. As his family is rounded up to be shipped off to the Nazi labor camps, he escapes deportation and eludes capture by living in the ruins of Warsaw.