The Thirty Years War continues to ravage 17th century Europe, but a new force is gathering power and influence: the Confederated Principalities of Europe, an alliance between Gustavus Adolphus, King of Sweden, and the West Virginians from the 20th century led by Mike Stearns who were hurled centuries into the past by a mysterious cosmic accident.

A cosmic catastrophe, the Ring of Fire, strands the West Virginia town of Grantville in the middle of Europe during the Thirty Years War. The repercussions of that event transform Europe and, in a few years, begin spreading across the world. By 1636, the Ring of Fire's impact is felt across two great oceans, the Atlantic and Pacific.

Isaac Gallant is the heir apparent to the First Admiral. Unwilling to let his mother’s tyranny stand, he joins the rebellion and leads his ships into war against the might of his own nation. Betrayal and failure, however, see Isaac Gallant and his allies captured. Rather than execute her only son, the First Admiral instead decides to exile them, flinging four million dissidents and rebels through a one-shot wormhole to the other end of the galaxy. There, Isaac finds himself forced to keep order and peace as they seek out a new home without becoming the very dictator he fought against.

Having made a superior look a fool, Honor Harrington has been exiled to Basilisk Station in disgrace and set up for ruin. Her demoralized crew blames her for their ship's humiliating posting to an out-of-the-way picket station. The aborigines of the system's only habitable planet are smoking homicide-inducing hallucinogens.

On the outside, Dina Demille is the epitome of normal. She runs a quaint Victorian Bed and Breakfast in a small Texas town, owns a Shih Tzu named Beast, and is a perfect neighbor, whose biggest problem should be what to serve her guests for breakfast.