Author: Diana Kimpton; Welsh Adaptation: Eleri Huws.

Cadi Wyn and her animal friends turn detective when things start to go missing on the Island. They soon discover there's a furry thief at work, but can they catch the culprit before anything else is stolen?

Awdur: Diana Kimpton; Addasiad Cymraeg: Eleri Huws.

Mae Cadi Wyn a'i ffrindiau anifeiliaid yn troi'n dditectifs wrth i bethau ddechrau mynd ar goll ar yr ynys. Maen nhw'n darganfod mai lleidr blewog sydd wrthi, ond a fyddan nhw'n medru dal y troseddwr cyn i bethau eraill ddiflannu?