In the late 19th Century, a Pax Britannia maintains prosperity and freedom in the Solar System. This balance is threatened by the rise of a multinational criminal organization called MEDUSA. Using a dreadful new weapon they can destroy all governments and seize the the Solar System in an iron grip. Only Captain Robert Folkestone, Sergeant Felix Hand and Lady Cynthia Barrington-Welles stand between MEDUSA and total domination. Should they fail, the 19th Century will be consumed by terror, destruction and fire.