Every day is a holiday in the weird and wonderful House of Fun, now the grown-ups have all been sucked up into the Spoonheads' space zoo.

When three of Bryan's precious malted milk biscuits go missing, Stinky and Icky couldn't care less. But when Old Faithful, Stinky's favourite (and only) jumper disappears, they know there's a thief about. Surely, a thief with no sense of smell ...