Whenever mist hangs over the waters of Lake Orwell on Harlech Island, sailors catch sight of a phantom castle just out of reach. As they draw near, it fades into the fog like a mirage, leaving only questions for all who have borne witness to this "Castle Strangerock."
An up-and-coming scholar named Charlotte L. Wells has had her interest piqued by this local legend and desperately wishes to study it in person—but of course, Harlech Island is no place for an unescorted young lady. To aid her in her investigation, therefore, she enlists the help of an old childhood friend and fallen knight who agrees to accompany her on this adventure.
Arriving in Harlech and catching sight of Castle Strangerock almost immediately, Char dives into researching the mystery head-on, leaving her companion to explore the surrounding environs on his own in search of any artifacts that might help trace the origins of this ephemeral stronghold.
Sadly, this almost immediately leads to his death at the hands of a mysterious swordsman seemingly displaced in time...but death is to be only the beginning of his adventure.