Severus Snape wakes one morning to find his front lawn overflowing with creatures he hoped he'd never see again when he left the Kingdom of Far, Far Away. Apparently they've been thrown out of the country close to his grounds. The only way he can get his grounds back is by rescuing Prince Draco from his prison and delivering him as a bride to Lord Voldemort.
While working on a high profile case, Harry receives full guardianship and custody over Teddy Lupin. He takes some time off to get to know the boy, but when work calls he had to find someone to take care of Teddy. Harry finds a babysitter in the one person he never thought would ever want anything to do with him or the small boy, Draco Malfoy.
During a shopping trip on a street in Muggle London with his son, Harry runs into the least likely person to shop there. Literally.