Love rests in blood

In a respectable private school for boys, a double murder was committed: someone shot the young teacher of Somers and the lava that had produced him. The police are at a loss, especially when it turns out that the next day, the elderly widow of Mrs. Bly was killed in a neighboring village. Professor Feng, who helps the police, suspects that all these three killings are closely connected, moreover, the reasons for the incident should be sought in old papers that Mrs. Bly found in her house during the repair...