Blood Brother by Jill Gregory is the story of two brothers, Rhett and Sky, and their journey from Scotland to America in the 1700's. It follows their struggles as they find themselves separated during their voyage when Sky falls ill and is quarantined. The story is set mainly in Scotland and America during the Revolutionary War, and details the triumphs and tragedies the two brothers experience as they strive to reunite and survive in their newfound world. Despite all odds, the brothers eventually find the strength and courage to reach each other and create a life together in America. The story details friendship, loyalty, and courage in a captivating and heart-wrenching tale.