Professor Vidyadhar teaches Hindi in a college and resides in a flat with his wife, Shobha, and school-going son, Pappu. He leads a fairly routine and mundane life, until a new resident in the flat upstairs moves in - an attractive young actress by the name of Menaka Khanna, the daughter of a wealthy man, Dinanath. Shobha does not approve of her at all and tells her so in quite a candid manner. An enraged Menaka swears she will make Shobha regret her criticism. So she decides to seduce Vidyadhar and does succeed to a considerable extent, and even plays his bride in a commercial for "Vicks Vaporub". When Shobha finds out, she decides to put an end to this affair, and a terrified Vidyadhar consumes a portion that makes him invisible, thus temporarily saving him from his wife`s wrath.