London Has Fallen is a sequel to the hit film Olympus Has Fallen, in which Gerard Butler once again took on the role of Secret Service agent Mike Banning. While in the first part he had to protect the American president from an attack and infiltration of the North Korean army into the White House, now, promoted to the head of the American secret service, who follows the president like a shadow, he must face an even more difficult challenge and protect the president from terrorists in London, where, in addition to the most influential man in the world, other political leaders of the world are gathered.