Poonam Ki Raat (Full moon Night) is a 1965 horror thriller film starring Manoj Kumar, Prem Chpra, and Rajendra Nath in lead roles.

With every relative wishing for the early death of Lalaji and wanting a stake in the property, things take a dark turn where no one can be trusted and everyone is a suspect.

This includes Lalaji's sister (Leela Mishra) and her son Ramesh and his girlfriend Mukta, Chandan's elder brother Narendra and his wife.

He persuades Chandan to show him the closed rooms of Rani, in a separate annex, which was forbidden to enter by any one after her death twelve years ago by orders of Lala Baijnath.

To add further excitement, Nandini dumps her expensive bangle into the well and challenges Prakash to bring it out and keep the same as reward.

As the time passes the day of full moon arrives again, warned by the gardener (Jankidas) and family doctor all are asked to stay vigilant to face any untoward incident.

In the midnight, a silhouette with a knife in her hand approaches sleeping Lala Baijnath and stabs his blanket covered body.

He recovers from his paralysis due to further shock, reveals to all that Nandini was actually the daughter of Rani and was suffering from the same mental disease as her mother, an illness whose attacks occur on full moon days and which had cost her life twelve years ago as she had accidentally fallen down from the stairs.

Nandini leaves the place satisfied and sings the same haunted song as she marches ahead towards the open terrace.