In the Heart of the Machine(В сърцето на машината)

In 1978, a young prisoner is given a chance to shorten his sentence if he gathers a crew to double production during their work at the Kremikovtsi plant. His team, which includes murderers and criminals, faces problems when one refuses to work due to a pigeon trapped in one of the machines. As tensions escalate, the prisoners realize the only solution is to rescue the bird.