Night, an empty country house and the incomprehensible disappearance of its inhabitants... If you are a private detective who finds yourself here alone, you must think quickly. Because somewhere very nearby lurks a ruthless killer - cold-blooded and extremely calculating. He always strikes to death - and today is the night of his hunt. To save your own life, you need to do only one thing. In a few minutes, solve a mystery that has been beyond the power of the police and anyone else for many years. And the countdown for seconds has already begun...