Arthur is the illegitimate son of Magnus Blackwood. After the death of Magnus's wife, Arthur and his mother are taken into the Blackwood household — which fills Caspian, who had once shown Arthur kindness, with rage and a sense of betrayal. As punishment, Caspian plays the obedient, well-behaved heir in front of his parents, while revealing his devilish nature only to Arthur. In the process, Caspian finds himself drawn to Arthur in a way he didn't expect.
