A serial killer has been in action for several months and the Intelligence Department has not been able to stop it. According to our investigations, the killer follows a very specific pattern, and according to this pattern, he will act again in the next 90 minutes. The problem? We don’t know where or who his victim will be. Working together, you’ll have to find out to prevent another victim. The only thing we can tell you is that the killer always enters through the blue window…