Sam's life had been sliding down the toilet like a slug on a slippery dip since his little sister, Miss 'I'm sooooooo perfect' Smelly Melly Prissy Pants' was born. But in the 'sticks' of Agnath he found a best friend, Jared, a tall skinny redhead with a gazillion freckles. And when underground tunnels are discovered right below them, it's Sam that encounters the deadly inhabitants. Sam and Jared are off on another FREAKY adventure. Sam and Jared's exploration of a series of underground tunnels and its deadly inhabitants find them experiment with glowing and collecting their own toe jam, which comes to life as a parasite!Sam's been hard at work all summer trying to build up the world's largest, smelliest, grossest ball of toe jam from the cow poop, slug slime and sweat between his toes. But when he uses Smelly Melly's toothbrush to try and dig out the huge dob of mouldy, smelly muck from between his toes, well, let's just say ... it's not too happy about the move.