The Mark of Cain, a feature-length Documentary by Alix Lambert, explores the dying art of Russian prison tattoos to offer audiences an understanding of conflict and transition in contemporary Russia. Through intimate interviews that enable the prisoners to talk about their life experiences, body art, and living conditions, a powerful story emerges of tension between prisoners of different generations and different social-economic systems. The Mark of Cain documents for the first time the disappearing artistic practice of Russian prison tattoos; further, the film investigates the nature of change in Russia by examining what is happening in the country's prisons.