Merrilee and Tuck are reunited just as the armies march off to Gron to destroy Modru, who is planning to return his master Gyphon from his exile. He is also using the Myrkenstone, a large unexplained meteor, to cover Mithgar in darkness so that his hordes won't be affected by sunlight. Despite this lack of advantage, the good guys attack the fortress and manage to break in, but Danner falls victim to a berserker attack and is killed opening the gates.