Source plot synopsis — includes the ending
Celian d'Arestide – The player character, Celian is noble, chivalrous knight who fights to preserve his order amid the Inquisition. Unlike many of his contemporaries, Celian received a formal education in addition to his combat training. Due to him falling from a tower in his past, Celian has lost all of his memories prior to adulthood.
Marie d'Ibelin – The granddaughter of Guy d'Ibelin, Marie was raised in Saracen traditions. She joins Celian after being branded a heretic by the Inquisitors. Taught to fight and defend herself at an early age, she utilizes twin daggers in combat.
Roland de Saint-Omer – A senior member of the Templar order who fought alongside Celian in several campaigns in the East.
Lady Isabelle – a French messenger sent by Phillip IV, you later find out that she is trying to destroy the templar order and she masks her goals to Celian and his friends.
Wilhelm of Beaujeau – The Grand Master of the Templar Order and Celian's longtime mentor. He is described as a wise leader who is physically robust despite his advanced age.
Phillip IV – The King of France, and one of the primary antagonists. He betrays the Templar Order and allies himself with the Inquisition.
The Byzantine – A secondary antagonist introduced in the Arena DLC pack. He lives in a fortified castle with a large arena, and forces his prisoners to engage in gladiatorial combat.
Story
In 1291, the Crusades and the Kingdom of Jerusalem are nearing their end. Acre, the last Christian city in the Holy Land, is under siege and about to fall into Mamluk hands.
Celian and Roland, two Templar knights, arrive in Cyprus to consult the Templar Grandmaster about their quest for the Holy Grail. They discover that the island is under attack by Muslim warriors and rush to defend it. They rescue a kidnapped messenger from Guy d'Ibelin, who informs them that the Grandmaster's daughter, Marie d'Ibelin, is imprisoned by the Inquisition.
After consulting the Grandmaster, Celian and Roland travel to an undisclosed location in Europe, uncovering a major plot by the Inquisition led by Isaiah. They rescue Marie, but Roland is left behind and presumed dead. Marie then becomes Celian's partner in their ongoing quest for the Grail. They fight numerous Muslim enemies and help those in need, despite Marie's criticism that they are wasting time.
Eventually, they learn of Guy d'Ibelin's death and the permanent loss of the Holy Land. They find the Holy Grail Temple, only to discover it empty. A dying Templar inside mistakes Celian for the Grandmaster. Running out of options, they head to France for advice from the Grandmaster and the main Templar Order.
In 1307, they arrive in France as King Philip IV and Pope Clement V accuse the Templars of heresy. Both are captured by the Inquisition but are saved by Roland, who was tortured into joining the anti-Templar movement but remains loyal to Celian. Roland helps them escape, and they reach a fortified Templar stronghold to regroup and fight the French army.
The Grandmaster reveals that Celian is actually Hugues de Payens, the founder of the Templar Order, suffering from memory loss due to an assassination attempt by the Grandmaster himself. Hugues had hidden the Grail to prevent it from prolonging the lives of the nine founders. The Grandmaster, one of the original nine, manipulated Hugues into searching for the Grail, hoping he would lead them to it.
The true antagonist is revealed to be the Templar Order itself. Celian, regaining his true identity as Hugues, realizes his castle is the best hiding place for the Grail. In the end, the player defeats both the Grandmaster and Isaiah and chooses to either use or destroy the Grail, affecting the final narration with either immortal guardians or a free humanity.
Sources and content license
Source and revision history ↗ · Adapted from Wikipedia contributors, The First Templar. Section headings and formatting adjusted. · Content license