Two young pigs wave farewell to their mum and set off on an epic journey to find their father. . .

It's been two years since Heather got the farm in Scotland back for Isla and her dad, and she is struggling. As her piglets grow up, Heather is having to adjust not only to being a single mum, but also to having to deal with their adolescence. Over the years Heather has had many litters, but, not to put too fine a point on it, hitherto none of them made it past the suckling stage. But now Heather is no longer a working animal and is raising the two piglets she had with Aitor the stripey Bearded pig from London zoo. She's having to cope with the inevitable problems which come with being the mother of two cheeky, opinionated, adolescent piglets - Eder and her brother Tor.

When a near disaster leaves Heather at death's door, her friend Rhona takes matters into her own hands. She decides the piglets need some discipline, and if Heather is too ill to provide it, she must find someone who can. She sends the piglets off to find Aitor, their father, last seen in a disused coalmine outside Gateshead some two years ago. . .