Set in the Kingdom of Lothric, a bell has rung to signal that the First Flame, responsible for maintaining the Age of Fire, is dying out. As has happened many times before, the coming of the Age of Dark produces the undead: cursed beings that rise up after death. The Age of Fire can be prolonged with the linking of the fire, a ritual in which great lords and heroes sacrifice their souls to rekindle the First Flame. However, Prince Lothric, the chosen linker for this age, has abandoned his duty and instead chooses to watch the flame die from afar. The bell is the last hope for the Age of Fire, resurrecting previous Lords of Cinder (heroes who linked the flame in past ages) to attempt to link the fire again; however, all but one Lord shirk their duty. Meanwhile, Sulyvahn, a sorcerer from the Painted World of Ariandel, wrongfully proclaims himself Pontiff and seizes power over Irithyll of the Boreal Valley and the returning cathedral from Dark Souls, Anor Londo as a tyrant.
The Ashen One, an Undead who failed to become a Lord of Cinder and thus called an Unkindled, rises and must link the fire by returning Prince Lothric and the defiant Lords of Cinder to their thrones in Firelink Shrine. The Lords include the Abyss Watchers, a legion of warriors, sworn by the Old Wolf's Blood which linked their souls into one, to protect the land from the Abyss, and were ultimately locked in an endless battle between each other; Yhorm the Giant, who was once a conqueror of the very people for whom he then sacrificed his life; and Aldrich, who became a Lord of Cinder despite his ravenous appetite for both men and gods. Lothric himself was raised in order to link the First Flame, but rejected his destiny and chose to watch the fire fade.