A region within Vulcan’s Forge, on planet Vulcan. Legend states that Surak crossed the Plain while the hot blood of battle still lay green upon it. With logic, he is said to have cooled it. Essentially, the tale is a religious metaphor for the means by which Surakian teachings brought peace to ancient Vulcan. Jonathan Archer and T’Pol, led by Syrran, came across the Plain of Blood while searching for the Syrranites in 2154. Syrran conveyed the history of the region to the others.