No Smoking

So I saw this movie .
Only thing was that I couldn't comprehend the story. I actually didn't understand
what was happening after the interval.
The story is definitely different.
Till interval the movie is simple.
A wife wants to divorce his husband(John Abrahm) because he smokes.
So he decides to go to rehabilitation centre run by a baba(Paresh Rawal) .The method used by baba to 'cure' the patient is quite bizarre. What follows after that is out of this world.
The movie is at times witty but more often it is creepy.
May be I need to see it again to understand it.
There is dialogue in the movie which goes something like this
"atma hai toh sharir ishwar hai ,
nahi hai to sharir nashwar hai"
PS: I went to the movie with a friend who smokes. The movie definitely didn't convince him .