LONDON HAS FALLEN (Rated R)

Only three years ago, “Olympus Has Fallen” set forth the preposterous plot of a North Korean terrorist attack on the White House during the course of which President Benjamin Asher (Aaron Eckhart) was saved by then-demoted Secret Service Agent Mike Banning (Gerard Butler).

The action heroics of Butler’s Agent Banning invited comparisons to Bruce Willis’ John McClane from the “Die Hard” franchise, considering that he operated pretty much like a one-man wrecking crew hell-bent on killing as many of the bad guys as possible.

In the present day, at the start of the nominal sequel “London Has Fallen,” Mike Banning, the trusted protector President Asher, now serving his second term, contemplates retirement from the service as his wife (Radha Mitchell) is expecting their first child.

The resignation letter sits in draft form on Banning’s computer and there it will remain because the sudden death of the British prime minister occasions the need for the president to attend a state funeral in London where the heads of state of many nations will congregate.

Working with Secret Service Director Lynne Jacobs (Angela Bassett), Banning realizes the high-stakes for the quick planning that must occur for the President and his protective detail to safely make the trip to St. Paul’s Cathedral in Britain’s capital city.

The backdrop to the story is the knowledge of a drone strike on a lavish wedding party in Lahore, Pakistan, where the target is the father of the bride, Aamir Barkawi (Alon Moni Aboutboul), a lethal arms dealer and one of the most wanted men in the world.

With every powerful world leader expected to attend, the funeral should be the most protected event on Earth. But the sadistic terrorist Barkawi and his equally villainous son Kamran (Waleed F. Zuaiter) have carefully plotted an infiltration of Britain’s security forces.

Within moments of arriving, heads of government are assassinated and virtually every recognizable London landmark, from Westminster Abbey and the Houses of Parliament to iconic bridges, is destroyed by explosions. Even Buckingham Palace is under siege.

Back in Washington, D.C., Vice President Trumbull (Morgan Freeman) takes command of the Situation Room, with the help of top advisors (Melissa Leo and Robert Forster, returning once again as the secretary of defense and the head of the Joint Chiefs of Staff, respectively).

One of the president’s key advisors observes that Barkawi is number six of the top 10 most wanted. Barkawi appears most anxious to rise in the rankings when he tells the American government that his ambition is to capture President Asher for a televised execution.

Just as German terrorist Hans Gruber failed to account for the resolve of John McClane in “Die Hard,” the same could be said for Barkawi and his minions not figuring on the resiliency of Mike Banning to foil the most dastardly plot to assassinate the American commander in chief.

Coming under heavy fire from terrorists impersonating British police and intelligence officers, Banning and Asher have to make a thrilling escape on the nearly deserted streets in a high-speed car chase to reach the Marine One helicopter.

Meanwhile, Vice President Trumbull and the top advisors race against time brainstorming to get those trapped in London a lifeline of support and a way out, a process that appears increasingly complicated and compromised by an apparent mole in British intelligence.

Outnumbered and outgunned, Banning reaches out for help from trusted British MI6 agent Jacquelin Marshall (Charlotte Riley), who rightly trusts no one as she helps the Americans to get to a safe house.

Safety, however, is not the operative word in a city terrorized by legions of armed thugs machine-gunning everything in sight. Before long, Asher and Banning are on the run once again until the President is unfortunately captured by the terrorists.

The carnage that takes place with wide-scale destruction of people and places is certain to induce groans of disapproval in certain quarters. But “London Has Fallen” offers plenty of rousing action that serves well enough for mindless entertainment.

Though over-the-top and outlandish in its action sequences, “London Has Fallen” is a guilty pleasure film that can be enjoyed because it’s so outrageously staged. An added benefit is that the running time of 90 minutes keeps everything moving at a fast clip.

Gerard Butler has found his ticket to a franchise with his gritty portrayal of the wise-cracking Secret Service agent Mike Banning.

More action could be in store for him even when President Asher is termed out of office, and there’s a new occupant in the White House.

Tim Riley writes film and television reviews for Lake County News.