It's a dark erotic horror story. It's a work of fiction and has nothing to do with reality.

Prologue:

Rakh was a dangerous evil demon in 1700's. He was lethal and killed many people mainly beautiful young girls who was afraid of his ugly face and body. So he punished those girls by raping them and torturing them to death. His torture was increasing day by day. So the villager seek help from a powerful Pandit. But the pandit realised the monster was more powerful than him. Still he fought with the monster but was killed in the process. The Pandits daughter decided to avenge her father. So she sacrificed herself and summoned divine powers. The monster was killed by the divinity but his soul remain caged in that palace forever.

The monster had people who worshipped him.