The Face of an Honest Man (слэш)

He had meant to do it in a way that was magnificent. Or if not magnificent, then at least controlled. Or if not controlled, at least kind.
Instead, Sherlock barely makes it back to London, where he's thrust into John's unwilling care. How do you fix a problem so big it may or may not have broken physics? What's an apology worth, when John is lifting off the skin of the world?