The "scent mysteries" for children tell a crime story in different cities around the world on 12 double pages. There are 12 scents to identify in each case, which help to solve the mystery. Supernose, the dog detective, is greedy, lovable and a brilliant tracker. He lives with his master Rhino in a small junk store in London. Ratzia the rat is his junior partner and an absolute mastermind. In the first volume, London's most famous cat is kidnapped and a ransom demand is made. Help the two friends on their search for clues to solve the case and get to know the original London locations.