Слишком много любовников

A man approached a famous private detective with a request to find his missing lover Alena and immediately gave him an extremely generous advance. At the first glance of the detective, Alena's life was unremarkable - there seemed to be nothing to catch on to. But as the investigation progressed, new victims began to appear and now this case has taken a completely different turn. What was modest Alena hiding if her disappearance led to such strange and terrible events?