It was 1992..
“Y” was killed on May 29th 1992 by “X”. The age of Y at the time of his death was 30.
Now its 2012…
“Z” a friend of “Y” traveled in time and went back to May 28th 1992 and made “Y” kill “X” so that “Y” can’t be killed on the next day by “X”. (I’m sure you are confused, read it again )
After killing X in the past, Z returns to present and finds his 50year old friend Y alive.(Y’s age at the time of his death was 30 plus 20 years equals his present age 50, Wow great math )
So, from the next day(in present) people can’t find “X” because he was already killed by Y in the past, In fact the world will forget about the existence of a person X after May 28th 1992 because he was killed by X on that day. ( I know your Confusion is at its peaks )
Knowing this “W”, a friend of “X” travels in time and goes back to May 27th 1992 and waits there for “Z” to arrive on 28th. His plan is to kill ”Z” as soon as he arrives in the past so that he cant meet his friend “Y” which ultimately saves “X”.
I will end the story here. I can further continue this with the effects of Z’s death in past on present but if i do that you will go mad and stop reading this.
Now, What is this??
We have seen movies with the concept of time machine and traveling in time both in Hollywood and on Indian Cinema but alterations in past were strictly prohibited in those movies… , this is some thing very unique where any person can go to the past any number of times and make changes there which will have a direct impact on present.
Thank heavens its just a movie. Imagine if this is possible in real world, what would have happened.?
In todays context, JaganMohan Reddy would travel back in past to save his father, YSR from the chopper crash so that he need not be in prison today.
From now on if any one says “You can’t change the past” give them a wink and ask them to watch MEN IN BLACK-3