Dick, who lived in England, was on his way to the moat house during the War of the Roses. On the way to the moat house, Dick finds John Matcham, who had recently lost his horse to the mud.
Once Dick gets to the moat house, he is taken to a room above the chapel to be killed. An assassin was sent to kill Dick, but because of John Matcham coming into the room, the assassin flees. It was at this moment that Dick found out that Matcham was actually the girl he was supposed to marry, Joanna.
Dick and Joanna then found a way out of the moat house. If they jumped into the moat surrounding the house, they would be safe. Dick then leaps into the moat, and Joanna, who attempted to follow, got captured. Throughout the rest of The Black Arrow, Dick tries to rescue Joanna.
In one of Dick's many attempts to rescue Joanna, Dick gets a boat and many men to attack the house that Joanna was kept at. He steals a boat and tries to rescue her, but the attack failed and many men died.
On another of Dick's rescue attempts, Dick gathers horse men to attack men in the forest who were keeping Joanna. This time, they are the ones getting surprise attacked, but Joanna is rescued anyway. Dick and Joanna then walk to the castle, so that they could marry.
Dick and Joanna then get married, the war of the roses is won, and the story ends.