The village comes under attack from an Ogre and a Kelpie. Serpico fights the kelpie and Guts fights the ogre. Schierke sends her mind into the spirit realm and senses Undines, powerful water spirits, and allows herself to be possessed by the river spirit known as the Lady of the Depths, who uses Schierke to flood the river, washing the trolls, kelpie and ogre back into the underworld...