With the intervention of fate, Buffy experiences some “Déjà Vu” – and discovers a computer disk that Miss Calendar had dropped (just before she died). Indeed, the Paths of Fate had gone to work – as the disc just-so-happens to contain a spell/curse that can restore Angel’s soul (and make him good again).
It is here that Willow starts to venture deeper into witchcraft, as Willow undertakes the task of learning the “Restoration Spell”, even though Giles has warned her that “channelling such magic’s through yourself may open a door that you are unable to close again”. The spell involves reading several incantations (in both English and Latin), together with several candles, runes, incense and a “spirit orb” (which helps to transfer Angel’s soul). Willow eventually succeeds in casting the spell – and hence restores Angel’s soul (who is himself subject to a cruel Twist of Fate).