Эйзенштейн и Калавера

The film is based on Sergey Eisenstein’s film “¡que viva méxico!”, short story “maguey”. eisenstein is watching the film footage. unexpectedly, his film character turns into a revived calavera and steals his film. eisenstein pursuits her and finds himself in an episode of his film. calavera is nearby, she tries to destroy his movie. what is the mysterious film hiding and why does calavera need it?