What did the African student know who jumped out of the dormitory window the night after the kidnapping of his girlfriend? Was he an unnecessary witness? Or has irrefutable evidence fallen into his hands to expose the criminal? To answer these questions, the chairman of the community of students of the island republic hires a private detective Tatyana Ivanova. Unraveling the tangle of tragic circumstances, she comes to the conclusion that the student was poisoned with a strong dose of drugs and thrown out of the window. Tatyana knows who “helped” the young man die, but to prove this we need indisputable evidence...