The Key to Our Mystery

Little Tatiana was raised by her father as if he were preparing her to be a super agent, but one day the parent disappeared, and the girl ended up in an orphanage. When she grew up, Tanya joined the police force. She is a physical training instructor, but she is always ready to help her colleagues investigate, even if it's just about a missing student's laptop. However, over time, Tatiana starts to suspect that the disappearance of the laptop triggered a series of murders that happen one after another around the student. It is urgent to find it to stop the crimes.