While trying to repair a robot mouse, Kat finds a mysterious ring tucked inside a small drawer. When she shows it to Annie, they learn that it is an artifact of incredible evil from deep within the forest. The two girls, accompanied by others from the Court, go to destroy it, but the forest is full of danger, and not all of them will return alive.

After the attack the previous spring, Hogwarts is left a shaken community. Rose Granger-Weasley is among those still badly affected and in St. Mungo's, and Scorpius Malfoy is plagued by nightmares that are no longer only of what happened. Bit by bit, he and his friends will have to learn how to have normal lives again.

When she was a little girl, Ginny Weasley's brother wished her away to the goblins. She was able to escape, but years later, she finds herself drawn back to Jareth's kingdom to test herself against the Goblin King once more.

Rose and Scorpius have found themselves becoming friends rather than enemies, and life goes on at Hogwarts. Rose develops a crush on a bold Gryffindor fourth year, and Scorpius finds that he is more than just a Malfoy. All is not well, however, as danger posed to other worlds begins to threaten Hogwarts.

Rose Granger-Weasley returns for her second year at Hogwarts, eager to beat Scorpius Malfoy in every class, along with having a bit of fun for herself. However, she doesn't realize the sort of fun she might have until a group of pirates suddenly appear in the lake, turning her year from exciting to dangerous.

Scorpius Malfoy is at his first year at Hogwarts but can't seem to find a way to fit in, since everyone seems all too aware of who his father is. However, when a strange girl appears in his Charms class, he learns that his future doesn't have to be determined by what his family did all those years ago.

Princess Antimony of the Southern Isles is the youngest of ten children and feels as though no one notices her. One day, when wandering the castle, she meets her uncle, who shares a similar tale: Prince Hans.