Five students are chosen by Ms. Vaidehi for a "special research project" to study folklore in a quiet village called Black Hollow, far away in the hills. The place isn't on the map, and no one has heard of it. Their parents strangely approve the trip after Ms. Vaidehi speaks with them. As they reach the village, the place seems abandoned... and oddly frozen in time. Aarav's phone stops working.
Riya finds an old sign scratched with: "Turn back while you can."
That night, Maya hears a woman humming outside their window. The same melody Ms. Vaidehi hums in class.