As the Avengers and their allies have continued to protect the world from threats too large for any one hero to handle, a new danger has emerged from the cosmic shadows: Thanos. A despot of intergalactic infamy, his goal is to collect all six Infinity Stones, artifacts of unimaginable power, and use them to inflict his twisted will on all of reality.

Early eighteenth-century England is at war with the French. A frail Queen Anne occupies the throne, and her friend Lady Sarah tends to her ill health. When a new servant Abigail arrives, Sarah takes her under her wing, and Abigail sees a chance at a return to her aristocratic roots. As the politics of war become time-consuming for Sarah, Abigail steps in to fill in as the Queen's companion. Their growing friendship gives her a chance to fulfill her...