Punnami NaaguMovie
Naagulu (Chiranjeevi), a snake charmer, falls in love with Menaka, whose adopted brother Raju (Narasimha Raju) is in love with Naagulu's cousin Laxmi (Rati Agnihotri). Naagulu's father has been feeding mixing snake poison in his food since childhood, making Naagulu immune to any snake bite. Every full moon, Naagulu behaves like a cobra and searches for a woman and every woman he meets dies from his poison (Wikipedia)
About Punnami Naagu
Punnami Naagu is a 1980 horror, drama movie directed by Rajashekar.
The production information lists a runtime of 2h 10m, production credits from India, an original language code of TE.
The credited cast includes Chiranjeevi, Madhavi, Narasimha Raju, Rati Agnihotri. The synopsis above summarizes the central premise without adding details beyond the available title information.
