Urd gives Skuld a hard time as she tries to short cut learning magic.  Skuld is trying to learn so that she can get her own angel like Belldandy.  Urd remembers when she and Belldandy were younger and the time that she got her angel.  She is ashamed of her angel.  An angel reflects the inner soul and her's appears white and black reflecting her helf demon heritage.  When Urd makes a machine to amplify her powers, chaos breaks out and Belldandy can't control it.  It's up to Urd to call forth the angel that she banished and stop the madess.