The Elder Scrolls: Online is the seventh spin-off in the Elder Scrolls series, succeeding The Elder Scrolls: Skyrim. It was released in 2014 by Bethesda Softworks.
Several years prior to the Interregnum, Emperor Varen Aquilarios aspired to become Dragonborn in order to light the Dragonfires in the Imperial City, in turn legitimizing his claim to the Ruby Throne. The sorcerer Mannimarcoconvinced him that he knew of a ritual that could grant him this, but that it required the Amulet of Kings. Along with the leader of the Dragonguard Sai Sahan, the half-giant Lyris Titanborn and Abnur Tharn, the High Chancellor of the Elder Council, they became the Five Companions. They were able to retrieve the Amulet of Kings and begin the ritual in 2E 578. At that moment, Mannimarco used his magic to immobilize the others and reveal his true intentions. He was an agent of Molag Bal, and the ritual in fact weakened the dragonfire barriers between Nirn and Oblivion in an event known as 'the Soulburst.' This event allowed Molag Bal to initiate the Planemeld, a forceful merging of his realm of Oblivion and Nirn. Once the ritual was completed, aftershocks were swept across every corner of Nirn. Mages died or went mad, Red Mountain quaked in Morrowind, earthquakes shook Skyrim and heavy storms devastated the coasts of Elsweyr and Valenwood. The constellation of the Serpent grew so massive that it appeared to threaten every star sign at once.
The Tharn family, rulers of Cyrodiil through Empress Clivia Tharn, made a pact with Mannimarco, the King of Worms, who has agreed to aid the Imperial's military forces by resurrecting their soldiers, except for Clivia's father, Abnur, who of course opposes Mannimarco. Secretly, Mannimarco is a servant of Molag Bal, the Daedric Prince of corruption and domination. Molag Bal is harvesting the souls of mortals for power. The hero, known as the Vestige, is an adventurer whose soul has been harvested, which allows them to constantly return to life. The player is killed by Mannimarco in a sacrificial ritual and he is brought to Coldharbour, where he awakens to find a mysterious fellow known as The Prophet, who with Lyris Titanborn's help, helps the Vestige escape Coldharbour, freeing the Prophet but also imprisoning Lyris within Coldharbour. Once the Vestige escapes Coldharbour, they both awaken in Tamriel.
The events that unfold in The Elder Scrolls: Online occur all across Tamriel.
The events that unfold in The Elder Scrolls: Online occur during the Interregnum, in 2E 582.