Slime Sam and his human friend Sue are reading an exciting story, about secrets and mysteries and action. Sam is very impressionable, so he's completely taken by it. Suddenly, a mystery scroll appears out of nowhere! A scroll Sam knows he must keep safe. He tries to hide it under some cookies, under a carpet, among books, in cardboard pieces... Huh, cardboard? Where did that come from? It's because Sue is the master of cardboard crafts and she knows how to make a perfect safe for keeping Sam's precious scroll. She uses an idea from the book she's been reading - "The Da Vinci Code".