A holiday to Pluto seems like a well-deserved reward for Jon, considering he has just saved the entire planet. However, Mrs Hall has other ideas in mind – essays about life on Pluto to be exact. While trying (and failing) to dodge his homework, Jon realises that Pluto is much more interesting than he thought – that is until his little sister is kidnapped by blue-headed skwitches. Jon and Straxi rush off to find where the skwitches have been nesting and bring lil sis home safe and sound.