The gentle waft of cooking food pulls Leo from his room, promising the possible return of his brothers. He expects to find them off in the kitchen - with messy cookware and spoons dripping spaghetti sauce over the wiped floor-tiles - but Donatello sits on the couch, and Raphael is nowhere in sight.

Leonardo cranes his neck for a sweep of the apartment before approaching his brother. Don's pallor has faded to that of a ghoul, eyes staring blankly at no particular spot on the floor. Very quickly, Leo knows that something is wrong.

"Don? What happened?"