The International Trailer for Daybreakers which starts out the same as the First Trailer and then at 50 seconds goes into a different sequence of scenes.
Two-time Academy Award nominee Ethan Hawke plays Ed, a researcher in the year 2017, in which an unknown plague has transformed the world's population into vampires. As the human population nears extinction, vampires must capture and farm every remaining human, or find a blood substitute before time runs out. However, a covert group of vampires makes a remarkable discovery, one which has the power to save the human race.