Gumnaam – The Mystery is a 2008 Indian Hindi thriller film written and directed by Neeraj Pathak starring Dino Morea and Mahima Chaudhry.

The story then pivots to one of an aspiring actress, Ria (also Mahima Chaudhry in a double role), who models and acts in music videos.

Meanwhile, Ria is offered a lead role in a film by casting director Rishi Gandhi (Madan) on the condition that she leaves for Shimla the next day.

His assistant Rishi Gandhi delivers the cassette to Remon (Suman Ranganathan), a rich woman in a huge mansion in Shimla; the reason why he did so is not explained.

Ria later explores the cellars of the mansion and, to her horror, finds the dead body of the unknown lady resembling her in a coffin.