Alone in The Dark

The owner of Derceto, Jeremy Hartwood, died a few days ago. The police report, filled after a cursory investigation, concluded that the well-known artist had taken his own life. His devoted butler confirmed that Hartwood had been suffering from considerable mental depression fo some months. He had placed even more strain on his already delicate health by translating the many ancient manuscripts contained in Derceto's extensive library. He also suffered from insomnia and what few hours of sleep he had were troubled by particularly disturbing nightmares. He appeared to be convinced of a mysterious presence in the old house.
Desceto is now empty. Rumours abound of a curse or of an evil power dwelling within its walls. Such stories are not uncommon with houses like Derceto, especially in this particular area. For some days now, however, a cloud of doubt has hung over your mind... What are those strange lights inside the house at nightfall? What could account for the eerie noises to be heard each time you approach? Why did Jeremy commit suicide? And what compels you toward the house? What is Derceto's terrible secret?