The story begins in 1647 when King Charles I has been defeated in the civil war and has fled from London towards the New Forest. Parliamentary soldiers have been sent to search the forest and decide to burn Arnwood, the house of Colonel Beverley, a Cavalier officer killed at the Battle of Naseby. The four orphan children of the house, Edward, Humphrey, Alice and Edith, are believed to have died in the flames. However, they are saved by Jacob Armitage, a local verderer, who hides them in his isolated cottage and disguises them as his grandchildren.