From the back of the book.
A New World for Stormbringer
The balance between Chaos and Law has tipped. Barbarian hordes sweep across the land while civilization decays in doomed castles. Eldritch beasts terrorize the innocent. Arcane technologies are all but lost and foul Chaotic magic corrupts land and sea alike. In the age to come a cursed Prince will seek his destiny across this dying world. His path will be vengeance, his ultimate goal . . . to confront the gods themselves.
In this supplement to the acclaimed roleplaying game Stormbringer you can adventure in a heroic fantasy setting based on the World of the Five Planes created by the master of fantasy, Michael Moorcock. You will confront the most bizarre monsters and foil the deadliest plots on this and other planes of the Multiverse as you battle to free yourself and your world from the machinations of the gods.