Mr Ludwig was a very decent gentleman. Every morning he ate porridge, combed his moustache and put on fresh socks. But this morning something went wrong. When he opened the drawer to take out his favourite polka dot socks, all he saw was.... emptiness! "Oh no!" - exclaimed Mr Ludwig. "Where have my socks gone?" He looked around the room. Instead of socks on the floor, he found traces of .... small, colourful feet! The footprints led through the living room, hopped onto the sofa, jumped over Filemon the cat and disappeared behind the bathroom door. Mr Ludwig took a magnifying glass, put on his hat and set out to solve the mystery of the missing socks. But he wasn't ready for what he saw when he opened the bathroom door. Inside was... something very funny and completely unexpected. What was it that Mr Ludwig had found? And who was really running around the house in his socks?