From the back of the book:
"STEALER OF SOULS is a scenario book for use with the STORMBRINGER game. The scenarios depict a woman's quest for revenge against a deadly conspiracy of merchants in Bakshaan. The four merchants (rivals of the woman's father, a man named Haver Nikorn) hired Elric to storm his keep and kill him. That battle is chronicled in the Moorcock story entitled 'Stealer of Souls.'
Freyda Nikorn, the dead merchant's daughter, gathers together a group of adventurers and friends to embark on her mission of vengeance. The adventures in this book tell the tale of Freyda's vengeance against the four merchants, and her success or failure is determined by the players.
The gamemaster is provided with extensive information on the government, culture, and environment of Bakshaan. A complete description of a Bakshaan-Karlaak trade caravan is also included. Extensive character descriptions aid the gamemaster in storytelling.
Four pages of player pullouts provide the players with all the information they need to start playing the scenarios. The pullouts include player-character knowledge of Baakshan, a map of the city, and statistics for Freyda Nikorn.
The companion to this volume, called BLACK SWORD, tells of Freyda's quest to find Elric himself, and of their ultimate battle.
Familiarity with the STORMBRINGER rules is required to use this book fully."