Online:Story Quests

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Story Quests are the quests that form the main storyline of a zone. As of Update 21, all of a zone's non-missable story quests are listed in the Zone Story section of the Zone Guide. Any quest that is not part of the Zone Story is considered a Side Quest.

The storyline quests follow on from each other in a chain that will take you from one end of the zone to the other if you follow them in order; however, it is possible to complete a number of later quests in the chain without starting some of the quests that would otherwise come before them if followed in story order. To indicate this, quests in the story chain will either have a "Previous Quest" or a "Prerequisite Quest" listed in the header (sometimes both). A Prerequisite Quest is one which must be completed before that quest can be started; a Previous Quest is one which comes directly before such a quest in the chain, but is not required for that quest to start. Individual zone and alliance story charts represent this association visually.

Alliance Storyline
The Alliance Story comprises the original base game storylines, and is part of the first main story arc of Elder Scrolls Online, covering the Planemeld alongside the Main Quest.
Aldmeri Dominion — All quests for the Aldmeri Dominion
Daggerfall Covenant — All quests for the Daggerfall Covenant
Ebonheart Pact — All quests for the Ebonheart Pact
Army of Meridia — All shared quests in Coldharbour

Other Storylines
The Celestial Threat — Quests from the Star-Gazers of Craglorn
The Sublime Plot  — Quests from the Drake of Blades in the Imperial City
Reforging Orsinium  — Quests to help rebuild the ancient Orsimer kingdom
A Lost Legacy  — Quests to recover a powerful Argonian antiquity

Daedric War Storyline
The Daedric War Storyline is the second main story arc of Elder Scrolls Online. Unlike the Main Quest, it is not a single in-game questline; instead, it is an overarching story which spans multiple content updates in the form of DLC, Chapters, and free quests.
'''Vivec's Divine Power  — Quests to help Lord Vivec regain his lost powers
Shadows of Knowledge'''  — Quests to repel a Daedric invasion of Sotha Sil's domain
Heart of Summerset  — Quests to prevent the Daedric triad from taking control of the Crystal Tower

Season of the Dragon
The Season of the Dragon is the third main story arc of Elder Scrolls Online, comprising the Wrathstone and Scalebreaker DLC Dungeon Packs, the Elsweyr chapter, and the Dragonhold Zone DLC.
A Rage of Dragons  — Quests to defeat the Euraxian and Draconic invaders of Anequina
Reforming the Dragonguard  — Quests to restore an ancient order and drive the dragons out of Pellitine

Dark Heart of Skyrim
The Dark Heart of Skyrim is the fourth main story arc of Elder Scrolls Online, comprising the Harrowstorm and Stonethorn DLC Dungeon Packs, the Greymoor chapter, and the Markarth Zone DLC.
A Dark Conspiracy  — Quests to unravel ancient secrets of the Gray Host in Western Skyrim and Blackreach
The Untamed Darkness  — Quests to investigate the mysteries of Arkthzand in the Reach and Blackreach

Gates of Oblivion
The Gates of Oblivion is the fifth main story arc of Elder Scrolls Online, comprising the Flames of Ambition and Waking Flame DLC Dungeon Packs, the Blackwood chapter, and the Deadlands Zone DLC.
Ambitions of the Longhouse Emperors  — Quests to uncover an ambitious Daedric plot in the swamps of Blackwood
Disaster Incarnate  — Quests to expose a scheming Daedric cult in Fargrave and the Deadlands

Quest Map
 
This chart shows the primary Alliance and Guild story chains, and their association with the progression of the Main Quest. Click through to each zone page for that zone's detailed story chart.