Peranmaai begins with the announcement of the scheduled launch of a space vehicle carrying an Indian remote sensing satellite which would help scientists identify land suitable for agriculture. Very Close to this operation, in the same forest, the state forest department runs an NCC camp for women cadets. Dhuruvan (Jayam Ravi) is a trainer at the camp. Peranmaai film revolves around Dhruva (Jeyam Ravi), a forest officer raised in tribal community has to train NCC girls. He chooses 5 most arrogant girls (Dhansika, Maha, Liasri, Saranya and Vasundhara) for trekking inside a forest, who are unwilling to work with him. Later they venture into the forest only to witness an appalling scenario as they witness 16 aliens from foreign country having reached there to blow up the Indian Spacecraft that is to be launched.
