In a Holy Grail War, Mages (Masters) and their Heroic Spirits (Servants) fight for the control of the Holy Grail—an omnipotent wish-granting device said to fulfill any desire. Years have passed since the end of the Fifth Holy Grail War in Japan. Now, signs portend the emergence of a new Holy Grail in the western American city of Snowfield. Sure enough, Masters and Servants begin to gather... 

A missing Servant class... 
Impossible Servant summonings... 
A nation shrouded in secrecy... 
And a city created as a battleground. 
 
In the face of such irregularities, the Holy Grail War is twisted and driven into the depth of madness. Let the curtain rise on a masquerade of humans and heroes, made to dance upon the stage of a false Holy Grail. This is a Holy Grail War covered in lies.
 
(Source: Official Site, Aniplex USA, edited)
 
Notes: 
• Special premiere of Episode 1 in its English Dub occurred in Los Angeles at the Fate 20th Anniversary Showcase event and as well through Crunchyroll’s YouTube Channel on November 23, 2024 before the Japanese television premiere. 
• The Japanese advanced premiere occurred during the "Fate New Year's Eve TV Special 2024" on December 31, 2024.