Fate/stay night - Season 1 - Eps 13: Winter Castle
Shirou falls asleep and sees a dream of a flashback of Saber's past. We see Saber in plain olden time cloths walking up to a sword in a stone.Saber wakes up and notices Shirou is gone. She talks to Rin and despite Archer's objection they go looking for him, suspecting he has been kidnapped by an enemy.Shirou wakes up in Ilya's house as her captive. Ilya says how she wants Shirou to become hers.
About Fate/stay night

Title: Fate/stay night
First Air Date: 2006-01-07
Last Air Date: 2006-06-17
Status: Ended
Rating: 7.3/10 (from 209 votes)
Language: JA
Seasons: 2
Total Episodes: 24
Network: Teletama
Genres: Animation, Sci-Fi & Fantasy, Action & Adventure
Production Companies: Studio Deen, Notes
Synopsis
Shirou Emiya lost his parents in a fire when he was young and was later adopted by the sorcerer Kiritsugu Emiya. Shirou is drawn into the Holy Grail War summons a female "Servant" known as Saber to protect him and obtain the Holy Grail.
Cast

Noriaki Sugiyama
Shirou Emiya (voice)

Ayako Kawasumi
Saber (voice)

Kana Ueda
Rin Tohsaka (voice)