There's always something going on in "Ally's World"! Ally's totally gobsmacked when she finds out that her best mate Sandie's moving away and even more shocked to find that her big sis is considering going to university miles away from home. She's only just got Mum back and now everyone else seems to want to leave...Apart from Billy, that is, who's become a bit like a shadow, following Ally's every move - just what is the loveable muppet up to?