The Dark Lord has been defeated, but Dumbledore discovers there is still a piece of his soul hidden in a forest and he sends Harry and Severus to destroy it. The two wizards will obtain more than they imagined from their trip.
I swear I don't know how I've finished like this, with a little boy that should hate me clinging to me like a monkey. Maybe I should have just ignored him, and then little Severus would be now sleeping somewhere else. But then I would have been a heartless person.