A woman dies of a heart attack, but her loved ones have reasons to suspect that it was murder. In search of the killer and evidence, police officers and the deceased"s colleague take on the case. During the investigation, the protagonists encounter people with strange masks on their faces that allow them to use the resources of the human body to the maximum. Is there a connection between the murdered woman and the masks? Who created them and why? The heroes will have to find answers to these and other questions in their quest for truth.