What could be more unpleasant than food poisoning in places of public catering. You come to a restaurant or cafe to relax, socialize and have a tasty meal, and as a result you get a lot of health trouble and this is very bad. At the same time, the reputation of the institution suffers especially if it is located in a prestigious place and has already won certain fame. It happened in the history of Perfect Poison. Detectives Anthony and Betty are investigating several cases of poisoning in a luxury restaurant in the city center. Its owners suspect competitors and ask to find out the reason as soon as possible, otherwise their business will suffer greatly.