Roy is an experienced detective and specializes mainly in art theft. He has no equal in this case, but this time he was offered to investigate the case of the theft of diamonds. At first he wanted to refuse, he was not interested in banal theft of jewelry. But when he found out the details, the case interested him. It turns out that a well-known collector was robbed, who, among other things, collected rare diamonds. This is a very expensive pleasure. Each rare stone is worth a fortune, and he had at least a dozen of them. Who needed to steal stones, because they are almost impossible to sell. This is what the detective and you will have to find out if you want to help him in Hidden Trace.