Le film relate les six premiers mois de la guerre du Pacifique entre le Japon et les États-Unis. Il se focalise du côté américain autour des pilotes du porte-avion USS Enterprise (CV-6) et de l'officier de renseignement Edwin T. Layton.
Ce film fait suite au premier.
Depuis 20 ans les nations du monde ont travaillé ensemble sur un important programme de défense colossal fondé sur la technologie extraterrestre récupérée lors de la première invasion sous la supervision de David Levinson qui est désormais le directeur de la défense spatiale. Les forces armées de la Terre comptent maintenant des chasseurs équipés de canons lasers, des satellites de défense et des bases de défenses sur la Lune et sur Rhéa équipées des mêmes super lasers utilisés par les extraterrestres pour détruire les villes dans le premier opus.
The drama is a coming-of-age genre film, and centers on fictional Danny Winters (Jeremy Irvine), a young gay white man from Indiana, who flees the conservative countryside in the late 1960s and moves to New York City. Before leaving, he comes out to his parents, who are horrified. He leaves behind his younger sister. After reaching Greenwich Village, he is befriended by a multiracial group of young, gay and genderfluid street kids and drag queens. He meets older men Trevor (Jonathan Rhys Meyers), who soon becomes his lover and roommate, and Ed Murphy (Ron Perlman), the manager of the Mafia-owned Stonewall Inn, a gay bar in the Village. Ed colludes with corrupt policemen and exploits homeless gay youth to his own advantage. Danny gradually learns about gay culture from his new friends.
A group of high school students are in a car together in the night as a storm is brewing. When the storm gets worse, they look up ahead and see a tornado approaching. A girl begs for them to go, but the boy recording on a camera gets out to video tape the tornado. He gets back in the car, but the tornado picks them up before they can escape, killing them all.
President of the United States James Sawyer (Jamie Foxx) is generating controversy over a proposed peace treaty between the allied nations to remove military forces from the Middle East. John Cale (Channing Tatum) is a US Capitol Police officer assigned to Speaker of the House Eli Raphelson (Richard Jenkins) after he saved his nephew's life during a tour in Afghanistan. He is divorced and struggling to develop a better relationship with his daughter Emily (Joey King), who has a strong enthusiasm for politics. He hopes to impress her by getting a job with the Secret Service protecting the President, but his hopes are dashed when the interview is conducted by Carol Finnerty (Maggie Gyllenhaal), a former college acquaintance of his who believes him to be unqualified due to a lack of follow-through and respect for authority. To avoid admitting the truth to Emily, Cale takes her on a tour of the White House.
After a monologue delivered by Derek Jacobi, the film opens in 1603, with Robert Cecil, Earl of Salisbury, ordering a desperate search for a trove of manuscripts. Ben Jonson, who has the manuscripts, flees down the streets of London and into the theatre known as The Rose. Hot on his heels, the soldiers who have been sent to arrest Jonson, break down the doors and intentionally set the theatre alight. Successive flashbacks cast us back five and then forty years, as the film evokes the reputed life of Edward de Vere from childhood through to his entanglement in an insurrection, and later on to his deathbed.
In 2009, American geologist Adrian Helmsley visits astrophysicist Satnam Tsurutani in India and learns that neutrinos from a massive solar flare are causing the temperature of the Earth's core to rapidly increase. Arriving at a party in Washington, D.C, Helmsley presents his information to White House Chief of Staff Carl Anheuser, who takes him to meet the President.
In the timeframe of 10,000 BC, a tribe of hunter-gatherers called the Yagahl live in a remote mountain range in the Urals and survive by killing woolly mammoths, which they call "mannaks". The camp is led by a hunter who has proven his bravery by killing a Mammoth, and taking the White Spear. The people also strongly venerate an elderly woman, called Old Mother. Because of her different appearance to other humans in the village, it is assumed she is a Neanderthal, the "last of her kind", living with the Homo sapiens of the camp.
In a poor family in Mexico City, Adriana (Paulina Gaitán) celebrates her 13th birthday, and is happy about the bicycle her 17-year-old brother Jorge (Cesar Ramos) gives her. Their mother suspects Jorge has got the money for the present in a dishonest way, and forbids Adriana to ride it. Indeed, Jorge lures a tourist into a quiet street pretending to bring him to a prostitute, and with two friends rob the man by threatening him with guns. After the tourist complies, the three carry out a mock execution, revealing that the guns are only water guns.
On an expedition in Antarctica, paleoclimatologist Jack Hall and his colleagues Frank and Jason are drilling for ice-core samples on the Larsen Ice Shelf for the NOAA when the shelf breaks off.
In the quiet mining town of Prosperity, Arizona, an accident involving a rabbit causes a barrel of toxic waste to land in a reservoir. An exotic spider farmer named Joshua (Tom Noonan) has been making regular visits to the site, where he collects crickets for his spiders. Although the spiders have ingested the toxins, he is oblivious since the arachnids seem unaffected. Joshua shows Mike (Scott Terra), a local boy, his collection, which include Jumping spiders, Tarantulas, Trapdoor spiders, and orb-weavers spiders, including a female orb-weaver named Consuela. After Mike leaves, Joshua is bitten by an escaped tarantula and accidentally knocks down the spider cages, causing him to be killed by the spiders. After devouring him, the spiders grow to even bigger proportions.
During the American Revolution in 1776, Benjamin Martin, a veteran of the French and Indian War and a widower with seven children, is called to Charleston to vote in the South Carolina General Assembly on a levy supporting the Continental Army. Fearing war against Great Britain, Benjamin abstains. Captain James Wilkins votes against and later joins the Loyalists. A supporting vote is nonetheless passed and, against his father's wishes, Benjamin's eldest son Gabriel joins the Continental Army.
In late 1990s Los Angeles, Hannon Fuller (Armin Mueller-Stahl) owns a multibillion-dollar computer enterprise and is the inventor of a newly completed virtual reality (VR) simulation of 1937 Los Angeles, filled with simulated humans unaware they are computer programs. When Fuller is murdered just as he begins premature testing of the VR system, his friend and protégé, Douglas Hall (Craig Bierko), who is also the heir to the company, becomes the primary suspect. The evidence against him is so strong that Hall begins to doubt his own innocence.
Following a nuclear test in French Polynesia, the fallout irradiates a lizard's nest. Decades later, an enormous sea creature suddenly attacks a Japanese fishing vessel in the South Pacific, leaving only one fisherman alive. Dr. Niko "Nick" Tatopoulos, an NRC biologist, is sent to Tahiti and to Jamaica, where a wrecked village, footprints, and ship are found. Nick collects skin samples that lead him to believe the creature is an enormous mutant created by nuclear testing. It travels to New York City during the rainiest week of the season, leaving a path of destruction in its wake.
On July 2, a 500 km wide alien mothership enters Earth's orbit and deploys several dozen saucer-shaped "destroyer" spacecraft, each 15 miles (24 km) wide. As they take position over some of Earth's major cities, David Levinson (Jeff Goldblum), an MIT graduate working for a cable company in New York City, discovers hidden transmissions in Earth's satellites which he realizes is a timer counting down to a coordinated attack by the aliens. With the support of his estranged wife Constance Spano (Margaret Colin), the White House Communications Director, he and his father Julius (Judd Hirsch) gain entrance into the Oval Office to notify President Thomas J. Whitmore (Bill Pullman) about the attack. Whitmore orders large-scale evacuations of the targeted cities, but the aliens attack with advanced directed-energy weapons before these can be carried out. Whitmore, portions of his staff, and the Levinsons narrowly escape aboard Air Force One as Washington, D.C. is destroyed.