A murder committed in London in the mid-20th century is to be time-barred. Mr John, every night after work, used to walk up to his house to breathe fresh air. At December’s 10th, a cold rainy night, this walk seems to be fatal. As he was heading for his house, he stopped a taxi to take him home. The taxi driver was a serial killer, found unsuspecting victims, steal and then murder them. He never got condemned as the police have never been able to find enough evidences. You are a team of young police officers, who have taken the case in your hands and are trying to figure it out. You have only one hour to the murderer’s house to find the gun that kills all the victims, so you can present it to the court before the case is time-barred and the killer is forever free.