Set in 1775, Felicity: An American Girl Adventure follows the adventures of 9-year-old Felicity Merriman, who lives with her patriot family in colonial Williamsburg, Virginia. Felicity's father owns and operates a general store, while her mother cares for the family, which includes 6-year-old Nan. Mr. Merriman's apprentice, Ben, lives with the family and dreams of the day when the Colonies will declare their independence from England. When Felicity learns that a beautiful, spirited horse is being abused by its cruel owner, she befriends the animal and helps it escape. Strong-willed and determined, Felicity struggles through lessons on being a "gentlewoman" and makes a friend of Elizabeth (Katie Henney), a young girl from a loyalist family. As a year passes and Christmas approaches, Felicity proves her loyalty and courage through adventures revolving around family, friends and the coming revolution.
