Detective Naani (2009)

Mumbai-based widow, Usha Dutt, lives in Gulmohar Complex along with her divorced daughter, Priya Sinha and grand-daughter Anjali. Usha's son, Somesh, travels to the U.S. with his wife, and leaves his son, Nakul, with her. One day she witnesses someone falling from an upper floor, summons other residents but no body is found. She continues to observe the particular floor and notices a young female child. On the pretext of inviting her for Anjali's birthday, she knocks on the door, and is told by the lady, Tara Yadav, that they have no children, and it is just her and her husband, Raj, who live there. Not convinced, she notifies the police, who refuse to get involved, and she continues to spy and gets the support of other residents as well as her grandchildren. Then a mysterious male starts phoning her - and shortly thereafter a frantic Priya will telephone the police to notify them that her mother and her nephew are missing.