Tee Ratra revolves around the life of a couple, Rajan and Rajani Deshmukh. Over time, the two start a family of their own but their happiness doesn't last for long. Rajan soon starts spying on Rajani as he senses the presence of another man in her life. He gets his friend, a psychiatrist, who helps him out in getting out the truth from Rajani. Will this change things between the couple?