Harry and Hermione have one kid together. Hermione got pregnant with Harry's kid in the Forbidden Forest when they were 13, yet she decided to tell Harry she was pregnant, when she was 15. Apparently witches are pregnant for 2 and a half years. They named their kid Herman. But they never get married.

Meanwhile Lord Voldemort and Bellatrix have a kid together named Vellatrix. In the 7th book Harry is trying to kill Lord Voldemort. He throws a spell at him which causes him to die, but before the spell hits Voldemort, Voldemort casts a spell which will cause Harry to die a horribly slow and painful death. Vellatrix and Herman are watching Harry and Voldemort die but they do not see each other. As Harry lays in Hermione's arms, dying, his last words are "Hermione, take care of my son." Hermione is so upset that she decides to take Herman and move to a suburb. She moves in right next-door to the Dursleys. Later, Dudley marries Angelina Johnson, a witch from Hogwarts. They have a daughter together named Angela.

Angela loves Herman, but Herman hates Angela. While Herman is running away from Angela, he spots a woman. As he spots this woman, he remembers the knowledge he grew up with all of his life. He must avenge his father's death by killing Voldemort's child. He stalks Bellatrix (who was the woman), but never sees her child. Finally, he learns where she and her kid live.