Crimes periodically occur and there is no getting away from it, such is human nature. But it is important to uncover each of them and the criminal must be punished so that someone thinks about the inevitable punishment and does not commit bad deeds. Anthony and Karen are detective partners. They were charged with a high-profile case of poisoning an entire carriage of passengers. It has already received a resonance in society and journalists will constantly annoy detectives. A train arrived at the station, in one of the cars of which twenty passengers with severe poisoning were found. So far, no one has died, but half of them are in serious condition. While the assistants are interrogating those who can talk, our heroes need to carefully inspect the carriage and the entire train to find evidence leading to the criminal or the group. Help the heroes in Train of Mystery.