Hermione Granger and the Knights of Walpurgis

Dumbledore sent Hermione back forty-five years in the past, in a particular time and place that would be very convenient for her. And by convenient, Dumbledore meant sending her right in the middle, when Tom Riddle and his first Death Eaters were still soaking in the hot spring. ALL WET AND NAKED. Hermione nearly had an aneurysm the moment she saw them.