L: change the world

Watched the sneak preview of the movie L: Change the world... Went in totally without knowing what's the plot going to be like.

1st half an hour of the movie: Simi dai ji?
middle half an hour of the movie: huh? ridiculous?
last 28 mins: HAHAHAHAHHA..

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Synopsis:
L is the greatest crime-fighting genius the world has ever known. He proved without a doubt, that fellow genius Yagami Light is KIRA, but at a terrible price. Now with only 23 days to live, and without his trusty partner Watari, L must solve the new case before he runs out of time.