Hum Kaun Hai? (2004)

After the mysterious disappearance of her maid, butler, and gardener, Mrs. Sandra Williams, the wife of Major Frank, who lives in a palatial house with two children, Sara and David, writes a letter to the local employment agency to get replacements. Martha Pinto, in the company of Edgar and Maria, a dumb woman, apply for these vacancies. Sandra hires them, explains that her children's eyes may be damaged by sunlight, the curtains are to be drawn at all times, as she gets migraines by any loud noise everyone must remain quiet, there is no electricity and all work must be done during the daytime, and the entire house is candle-lit. The staff get busy with their work, and it is then Sarah tells her mom that she has noticed other people in the house that are visible to her only, and she draws the picture of a male, a female (his wife), their son, Vicky, and an elder woman with magical powers. Sandra disbelieves her, but when she starts feeling someone's presence in her house, as well as hearing noises, she decides to investigate. She finds out that the letter she had to the employment agency is still lying in the mailbox. How did Edgar and Maria came to know of the job vacancies? What is really going on in this eerie household?