A miner supervises the survey of a sealed Slovenian mine and drags to light a discovery that nobody wants to see. Ten years ago, a mass grave of four thousand war refugees killed in 1945 was found in the tunnel, and they remain unburied till today. The director and scriptwriter Hanna Slak follows the true event through the eyes of a relentless miner who faces first the dangerous underground and then the politically inconvenient truth.