Willow arrives home but somehow misses everyone waiting for her to get off the plane.  Things get worse when Xander discovers a skinless corpse at his construction site.  Thinking Willow may have had something to do with it, what's left of the Scoobies start investigating.  Willow is too but somehow she is invisible to the gang and vice versa.  When Willow is trapped with a demon eating her skin, the gang figure out that she may be in trouble and show up to help, with Anya who can see them both.