The first action of the mysterious, veiled killer by the side of Old Oak tree was murder. The old, worn-out newspaper page left in the hands of the deceased boy attracted more attention.Prosecutor Ilyas Ocagov and his team worked tirelessly, but they couldn't trace the killer. Ilyas, however, had arrived at a rather strange conclusion based on some evidence: "This murder was committed according to a chess pattern." His colleagues didn't believe in this theory.After some time, a series of new murders occurred in the same region. The cunning killer, however, left no trace behind. Ilyas was convinced that each of these events was carried out according to chess rules.He had no other way and was only following this trail to find the killer. He hadn't even thought about the dangers he would face in the battle arena he entered to find the mad killer who had turned the region into a bloody chessboard...