Summary Of The Movie- Olympus Has Fallen

Former Special Forces U.S. Army Ranger Mike Banning (Gerard Butler) is the lead Secret Service agent assigned to head the Presidential Detail. He maintains a personal, friendly relationship with President Benjamin Asher (Aaron Eckhart), First Lady Margaret (Ashley Judd) and, especially, their son Connor (Finley Jacobsen). During a Christmas evening drive from Camp David to a campaign fundraiser, a tree branch falls and strikes the front of the president’s convoy, making the vehicles skid out of control on black ice on a bridge. The lead SUV crashes through the guard rail and falls into the icy river below, leaving the presidential limousine teetering on the edge of the bridge. Banning is able to save President Asher, but Margaret and two other agents die when their vehicle falls and crashes.
Eighteen months later, Banning works at the Treasury Department, within sight of the White House. He has been removed from the Presidential Detail because the sight of him triggers Asher’s memories of the night Margaret died. During a political meeting between Asher and South Korean Prime Minister Lee Tae-Woo (Keong Sim), Korean-led guerilla forces, under guise as local garbage services and a crowd of tourists, mount an air and ground assault. Aided inside the White House by treasonous members of Prime Minister Lee’s own detail, who include Dave Forbes (Dylan McDermott), an ex-US Secret Service agent turned private contractor and aerial cover fire from a US military gunship, the attack results in the eventual capture of the White House. Asher and several top officials are held hostage in the White House bunker, where Prime Minister Lee is killed. Before he is killed, Agent Roma (Cole Hauser) alerts the Director of the Secret Service Lynne Jacobs (Angela Bassett) that “Olympus has fallen”.
The attack has been masterminded by Kang Yeonsak (Rick Yune), a former North Korean terrorist who appears to be motivated by hope for a reunification of Korea. Kang seeks to use Asher’s hostage status as leverage to force U.S. officials to withdraw military forces from the Korean Peninsula, allowing the civil war to end. He also seeks to destroy all of America’s nuclear weapons in their respective silos spread across the country and turn the United States into an irradiated wasteland as revenge for the deaths of his parents when his mother was killed by an American landmine and his father was executed for crimes against North Korea. To accomplish this, he requires the access codes to Cerberus: a fail-safe device that self-detonates any U.S. nuclear missiles during an abort, which are held by three top government officials within the bunker, including the president. Asher orders the other two officials to reveal their codes to save their lives, certain that he will not give up his code.
During the assault by Kang’s forces on the front lawn, Banning joins the White House’s defenders. He falls back into the building, disables the internal surveillance and gains access to Asher’s satellite phone, which he uses to maintain contact with Jacobs and Allan Trumbull (Morgan Freeman), the Speaker of the House who is now the Acting President. Authorized to proceed, Banning’s first act is to save Connor, who Kang plans to use to force Asher to reveal his Cerberus code. Despite resistance, Banning finds Connor hiding in the hidden tunnels behind the Lincoln bedroom walls, thanks to the training Banning had given him before, and sneaks him out of the White House before beginning reconnaissance and reducing the terrorists’ numbers one by one. This includes Forbes, but not before Banning convinces Forbes to report to Kang that he killed Banning. Meanwhile, Army Chief of Staff General Edward Clegg (Robert Forster) convinces Trumbull to order an aerial SEAL assault on the White House in an attempt to enter through the roof and shut down Cerberus, but Kang’s team deploys an advanced anti-aircraft remote gun system called the Hydra 6, mounted and assembled directly under the White House rooftop. Hydra-6 is a fully automated weapons system, capable of seeking targets independantly. Discovering this, Banning advises Trumbull and Clegg to abort the mission, but it proceeds and Kang’s hench-woman Lim (Malana Lea), by computer command, annihilates the assault force before Banning can stop it. Banning does succeed in destroying Hydra-6, but the damage has already been done, with only 2 of the 6 assault helicopters surviving until the mission is aborted, and another gets destroyed whilst escaping from the area, leaving only 1 surviving helicopter assault team. Kang retaliates for the attempted infiltration by killing Vice President Charlie Rodriguez (Phil Austin) on an open line to the pentagon crisis room.
After Banning disables Kang’s communications, Kang tries to execute Secretary of Defense Ruth McMillan (Melissa Leo) outside the White House in front of the media, but Banning's intervention allows her to escape and he takes out several more of Kang’s men in the process. With Kang’s forces dwindling, he fakes his own death as well as Asher’s by sacrificing several of his men and the remaining hostages. To the rest of the world, excluding Banning, The president himself is dead. However, Banning believes that Kang has faked his death and he believes he will attempt to sneak away. Kang, Asher and the few remaining terrorists stay in the bunker, unknown to the outside world. Kang eventually cracks Asher’s code and activate Cerberus as Banning realizes that his suicide was staged. As Kang attempts to escape with Asher, Banning kills the remaining terrorists, but the president is shot by Kang in the stomach. Asher is forced to watch Kang almost kill Banning, before Kang gets distracted by the president, and Banning kills Kang by stabbing him in the head with a knife after overpowering him in hand to hand combat. Banning disables Cerberus with the assistance of Trumbull with only 4 seconds to spare. During daybreak that day, Banning walks out with Asher and is recieved by the soldiers posted to await their arrival. Sometime after the events, Washington begins to heal from the terrorist attack and Banning once again becomes head of the Presidential Detail with Banning, Jacobs, General Clegg and Connor observing President Asher as he addresses the public.

Source: Wikipedia