In Ciri's attempt to flee the Wild Hunt, wounded and afraid, she makes a mistake as she jumps between worlds and ends up dragging two unwilling guests. Guts and Puck find themselves in the depths of Crookback Bog, lost, confused but ultimately better than ever as they continue their hunt for Apostles in this new world.
After a defeated battle with the godhand instead of feasting on his corpse the apostle were too terrified of guts and send him to a new universe where he believes he is making a difference but in reality he isn't. Of course Guts is always a struggler… M for Berserk (RubyXGutsXCasca) sequel Up The Inter-War