Dumbledore asks Professor Snape for a small favor, just looking after a dog for a few weeks. Snape is not a dog person, but a mischievous dog may be able to soften even the hardest heart.

Professor Severus Snape, a changed man back teaching Potions after the war, is furious when he discovers someone has stolen from his potions ingredients. His determination to discover the culprit leads to some unexpected results.