The film is set on the backdrop of a big bungalow and here lives Preethi (Pooja). Apparently, she is there as a caretaker of the bungalow but her real job is to look after the child Chinnu (Baby Soundarya). Chinnu’s parents are both doctors and so Preethi is given the job. However, Preethi feels that there is a stranger inside the big home and he is out there to kill the little girl. Due to this, she locks the door from inside and doesn’t allow anyone. Soon, the parents discover this and take the help of a leading psychiatrist