What would you do if you found the world's smallest  dog?

When Ernie and his family leave the countryside to move to the city, Ernie feels like he'll never settle into their new home.

Yet on his first night, a surprising new friend introduces himself – Swop is a very tiny dog. A dog that just happens to be the size of a satsuma.

Ernie vows to keep Swop a secret, but Swop has other ideas and he's determined to make Ernie's first day at his new school a memorable one!