The manga "JJBA: Purple Rock" by a Russian author tells about the adventures of Kirill Uglitsky, who is not a secret relative of the Joestars, in the investigation of the case of missing children in his city, which hides the real reason for Alexander Duplin's arrival in Kursk. Helping his uncle, one of the best investigators in Russia, he is faced with many dangers that he needs to overcome, not without the help of friends and whose enemies he will encounter on the way to solving the case and saving his hometown from impending danger.