Here is a possible concise summary:
Daybreakers is a movie about a world where most humans have become vampires due to a plague. Edward, a vampire hematologist, works for a company that farms humans for blood and searches for a substitute. He meets Audrey, a human rebel, who introduces him to Lionel, a former vampire who became human again after being exposed to sunlight and water. Edward tries to replicate Lionel's cure and discovers that drinking treated vampire blood can reverse vampirism. He infiltrates his company and spreads the cure among the soldiers, causing a chaos. He escapes with Audrey and Lionel, hoping to change everyone back.
Here are some key facts extracted from the text:
1. The movie is an action, adventure, fantasy film from 2009, titled Daybreakers.
2. The plot is set in 2019, where most of mankind has become vampires due to a plague caused by an infected bat.
3. The human population is dwindling and the vampires are looking for a blood substitute to avoid starvation and mutation into subsiders, which are irrational and monstrous creatures.
4. The protagonist is Edward Dalton, a hematologist who works for Bromley Marks, a pharmaceutical company and blood supplier.
5. Edward does not drink human blood and sympathizes with the humans, who are hunted and farmed by the vampires.
6. Edward meets Audrey Bennett, a human rebel who introduces him to Lionel "Elvis" Cormac, a former vampire who became human again after being exposed to sunlight and water.
7. Edward's brother Frankie Dalton is an army officer who hunts humans and reports Edward's location to Bromley Marks, his boss and the owner of the company.
8. Edward recreates the experiment with Lionel and Audrey and becomes human again, then discovers that drinking treated vampire blood is the cure for vampirism.
9. Edward and Audrey infiltrate Bromley Marks and spread the cure among the vampire soldiers, causing a feeding frenzy that turns most of them into humans.
10. Edward, Audrey and Lionel escape from the company and hope to change everyone back to humans with the cure.