After succumbing to an unenviable fate, Kiritsugu Emiya has left Shirou Emiya the duty to save mankind in his place. The world is dying and time is ticking, but when the salvation Shirou seeks is at the cost of his only family left—his younger sister—will he still have the heart to pursue this duty? Shirou is now pressed with the choice to continue being a hero of justice—or become the very evil his ideal has vowed to vanquish. The orphan is alone once again, yet his body is still made of swords. The Fifth Holy Grail War now begins with his oath under snow.
Many of the clichés in this movie predate the last Ice Age.
Fate/Kaleid Liner Prisma☆Illya Movie: Vow in the Snow -- an epic in miniature, a fantasy all the more poignant for its moral realities -- makes this a lesson worth learning.
The splendid effectiveness of Fate/Kaleid Liner Prisma☆Illya Movie: Vow in the Snow lies fully in the precise work of adaptation that the Weitz brothers make of the original text.