This week we travel to the far north and one of the wonders of the world. The houses of thunder are a mysterious pair of towers rising up out of the cold northern sea at the end of the Icewind cape.  Three years ago a permanent camp was set up by a group of wizards to study the towers, this summer when supplies arrived the camp was empty. Now a new expedition is being put together to try and find what happened at the camp during the winter.