Tumbal: The Ritual(2018)

Nira, Raka, Leo, Maya and Sisi make a horror film for their college assignment. They went to a sugar factory which is said to be very haunted. They were surprised by the appearance of Alya, Nira's adoptive sister who was autistic, secretly in the car. Alya was forced to go there. At the sugar factory strange noises, ghost sightings, even ghost terror came to them. They tried to get out of the sugar factory, but they couldn't. The mystery of 20 years ago was revealed. The factory belongs to Suryo and Nurmala. Nurmala was killed by Suryo. It turns out that Nurmala is Nira's biological mother.