Betty, a young greyhound who wasn't fast enough on the track has been dumped. Can Chris nurse her back to health and will anyone want to give a home to a washed up greyhound? Then, Chris is about to be confronted with the smallest patient he has ever handled. Twelve year old Elliot's much loved pet mouse, Pinot has developed a massive, cancerous tumour, but surgery on such a pint sized patient is going to be a real challenge. Will Pinot pull through or will a young girl be shattered?