Monsters is a 2010 British science fiction film, written and directed by Gareth Edwards. Alien life forms have spread throughout central America leading to the quarantine of half of Mexico. The U.S. and Mexican militaries are battling to contain the creatures, with a wall stretching along the American border. The story follows Andrew, an American photojournalist helping his wealthy employer's daughter, Samantha, get back to America. Their journey takes them across Central America and eventually into the 'infected zone.