As the anniversary of the day of his family's death approaches, he becomes more and more erratic. To relieve his suffering, he decides that the best way out is to join the rest of his family. He then decides to hire Jaggu (Jackie Shroff) to murder him on his family's death anniversary. Jaggu reluctantly agrees and on the fateful day, everything is in place for the event but then something goes wrong. The killer now has to fight for survival himself as he realises that he has been deceived.
BBC.Co.Uk: Sivan has probably decided to test the theory that after Raaz it is only movies that make one's hair stand that are successful commercially. From an audience point of view, Sandhya will be an interesting look into the minds of the insane and also a thrilling ride; as the promos say, What if the hunter becomes the hunted? Sandhya revolves around a psychiatrist Dr. Singhania whose family is ruthlessly murdered. The shock of such an atrocity turns his mind into a frenzied turmoil and as a result is admitted to the same hospital he was practising in. Memories of his tragic loss come flooding back to Singhania and leads him to depression. As the D-day of his family's massacre approaches, Singhania's mental illness becomes worse and decides to join his deceased family.
He does this by hiring a killer who will in turn murder him. Jaggu (Jackie Schroff) is chosen for this job who agrees with great reluctance. Soon the fateful day approaches and everything is in place for the murder. But just at this point Jaggu finds that he is in a twilight zone where he is the victim himself. He needs to now fight for his own survival, in order to wake up from his worse nightmare.
The highlight of this film will be its musical score that has been composed by Anand Raj Anand. Veering towards the 'rock' style, it will definitely entice the audience with fear as Sandhya reveals its horrendous secrets on screen.