Buffy is determined to have a Thanksgiving dinner at Giles' but things get crazy after Xander falls into a hidden chamber under the site of the new anthropology building.  Angel is also in town since Doyle had a vision that she was in danger but he doesn't want Buffy to know he's there.  Meanwhile, Xander comes down with several sicknesses and an Indian spirit of vengeance is out for revenge for what was done to his people in Sunnydale.  Spike, who cannot eat humans anymore thanks to the Initiative, seeks help from Giles and the gang and gets caught up in the fight with the vengeance demons.  After it's all over, Xander lets slip that Angel was in town (see Angel - I Will Remember You).