Harry was just cleaning Leila's face after a leisurely Sunday brunch with Ron and Hermione when a feline partronus came through the wall and wound itself around Harry's legs, a message entering Harry's mind through its touch. "Professor McGonagall wants something. Save that chess game for later, Ron?"
He was acting casual, but her message actually sounded quite urgent, which is why he decided to use the hated Floo to go directly to her office. Sure enough, he was banged around, circling a few grates before he landed properly at Hogwarts. He was surprised to see Professor Blank there as well. Usually he spent his Sundays with Sirius, doing things Harry avoided thinking about. His presence, more than anything, made Harry tense with dread. "Professor McGonagall, Blank? What's wrong?"