Al final del túnel

I feel some pieces were missing which made the story not so complete, and also made the movie not so reasonable. Why was there a crashed car in the unmaintained backyard? Why did a computer engineer have sleeping drugs to inject? Why did the computer engineer have a jar of poisoned cookie or chocolate in the house? Why did Joaquin can just knock off the ground of the vault, but the bad guys need to put a bomb to break into the vault? .. The idea of the story was good. It would be perfect if the lost pieces are filled into the movie.