What do two dogs, a cat and a pigeon have in common? They’re all looking for a white horse.

Lubber the dog is lost, so Squintum the Siamese cat decides to help him find home. Unfortunately, home is many miles and many dangers away. On the journey they’re joined by a racing pigeon with no sense of direction, and an abandoned Red Setter too easily mistaken for a fox.

Meanwhile, in a cottage under a hill with a chalk drawing on it, two sisters fear they’ll never see their beloved pet again.