In a not-so-distant future when lions are extinct Jachin-Boaz a middle-aged mapmaker leaves home with the wonderful map that was to tell his son where to find everything. In the ruins of a palace at Nineveh his son Boaz-Jachin finds the wall-carving of a great lion dying on the spear of an ancient king. In a series of rituals he evokes the long-dead lion & sends him out to stalk his father. Then he follows on the lions track.