A boy from an ordinary household is often told by his mother that their living conditions would get better once he becomes a big man. His wish to grow big is miraculously heard by a saint. Although the boy does turn big physically, mentally he continues to remain a boy. Unable to deal with this sudden change, he finds himself in a series of comical events.

Grand Hali is story of a satirical take on the concept of joint family in today's age. What happens when a domestic helper purposely creates confusion and misunderstandings in a joint family for his guilty pleasure is the crux of the story.