Lord Roxton und Marguerite sind gerade auf der Suche nach einem Weg aus der verlorenen Welt, als sie von nordischen Kriegern überfallen werden. Roxton wird vom Schwert der Anführerin durchbohrt, Marguerite verschleppt. Hilfe erhält Roxton von einem mysteriösen Jungen namens Osric. Der Lord ahnt nicht, dass der einen geheimen Plan verfolgt.
After days of searching the mountains for a pass off the plateau, Roxton and Marguerite are camped for the night when they are taken by surprise by Norse warriors. Roxton is run through with a sword by the leader, Ursula. As he sinks to his knees, Marguerite is hauled off by the raiders. Near death, Roxton is visited by a mystical young boy named Osric, who offers a deal. Osric will restore Roxton's life so he can save Marguerite. However, there is a catch. Roxton agrees to the deal and Marguerite is saved. It turns out that Osric is the soul of evil who has been imprisoned on the Lost World. He reappears and gleefully informs Roxton that he must murder Bergen, an old man with a long-standing hold over the boys' manipulative intentions. Roxton refuses to kill the old man, but Osric has many deadly ways to get what he wants. Meanwhile, Malone and Veronica must defend their Treehouse from a band of cutthroats who will stop at nothing to take it from them.
Mentre trascorre una notte romantica in tenda insieme a Marguerite, Roxton viene colpito a morte nell'attacco di un gruppo di uomini guidati da Ursula, donna guerriera.
Després de dies buscant a les muntanyes un camí per sortir de l'altiplà, en Roxton i la Marguerite acampen per passar la nit quan uns guerrers d'aspecte nòrdic els prenen per sorpresa. En Roxton és travessat amb una espasa per la líder, Ursula. Mentre en Roxton cau ferit, la Marguerite és arrossegada pels assaltants. A prop de la mort, En Roxton rep la visita d'un nen místic anomenat Osric, que li ofereix un tracte. L'Osric restaurarà la vida d'en Roxton perquè pugui salvar la Marguerite. En Roxton accepta l'acord i la Marguerite es salvada. Però el que no sap en Roxton és que l'Osric és l'ànima del mal que ha estat empresonada al món perdut i que aquest tracte el deixarà a la mercè de les perverses intencions del misteriós nen.
