Dolf a 15 year old boy is sent back in time by a timemachine. Accidentally he is sent back to the Middle Ages. He is rescued by children who are part of a childrens' crusade, on their way to rescue Jeruzalem. During the trip Dolf finds out the danger is not coming from outside the crusade, but from within.
Year three at Hogwarts means new fun and challenges as Harry learns the delicate art of approaching a Hippogriff, transforming shape-shifting Boggarts into hilarity and even turning back time. But the term also brings danger: soul-sucking Dementors hover over the school, an ally of the accursed He-Who-Cannot-Be-Named lurks within the castle walls, and fearsome wizard Sirius Black escapes Azkaban. And Harry will confront them all.
A teenager finds himself transported to an island where he must help protect a group of orphans with special powers from creatures intent on destroying them.