Formed between factual and fictional, future and past, material and incorporeal, scientific and magic, Monisme reflects the intermingled relationships between people in Mount Merapi.

Accused of murdering her lover, a young businesswoman hires a brilliant lawyer. With only three hours left, they must uncover what really happened.

It starts with Rana and his best friend Janu who are climbing a mountain in bad weather. In the middle of a dense forest, they got separated and lost. Janu is lucky to be back home at last. But not with Rana. An extensive search was carried out. Rana not found. A week has passed. Rana's extended family decided to hold a tahlilan. Rana is considered unlikely to have survived and will surely die there. Dini can't accept that. As a mother, Dini doesn't want to just give up and still believes that her daughter Rana is still alive. Sure enough. After the tahlilan, Rana came home in the pouring rain.

Ayu searches for a cure to save her dying sister Laras, a sex worker cursed by a magical amulet, while they face escalating terrors in their ancestral village.