It's springtime on Borough farm and there are new-born lambs every where. On the cliffs Wendy the sheep has forgotten where she has left her lamb, in fact she's forgotten that she had a lamb at all! As Jake bounds off in search of the youngster, Mist faces the tricky task of reminding Wendy of the lamb that she is missing.

Deep in the heart of Borough woods lives a legendary sheep so wild that not even the great Sir Gregory could bring her back to the flock. But the Boss has decided that it is time for the Legend to be bought back into the fold, and one by one the dogs set off in search of her. It is only Mist who finds the Legend, living in a strange castle deep in the woods. As the Legend tells Mist of her quiet and contented life, Mist realizes that she must choose between the glory of returning with the errant sheep, or doing the right thing and letting her be.

Jake loves to roll, but when he rolls off a cliff and ends up on the sea shore below, he finds himself in a pickle, as even with his long legs he can't get back up again. Luckily for Jake a friendly Swedish seal called 'Sven' bobs up to lend a flipper. He kindly guides Jake back up the cliff much to the surprise of the worried Boss and Mist.

Sheep do some silly things, but getting stuck on their backs is about the silliest. When Vanessa the ewe becomes stuck belly-up while trying to rub an itch, Mist knows that she must act fast. As a flock of cackling crows circle around, Mist races to fetch help. Having woken the Boss they arrive just in time to put Vanessa safely back on her own four hooves again.

The Boss is so pleased with Mist that he decides to enter her in a local sheepdog trial. But as the crowd look on, Mist's boundless enthusiasm turns against her, as she rounds up a huge flock of the wrong sheep in the wrong field! The Boss is humiliated and Mist hangs her head in shame. Just as she thinks that the whole day has been a complete disaster Mist spots two faces that make her spirits rise. Could the two watching dogs really be her long lost siblings?

It hasn't rained at Borough farm all summer and life is dusty and dry. The dogs are hot, the fields are bare but worst of all the ducks' pond doesn't have a drop of water. Mist is keen to lend them a paw. However, guiding four ducks to a new pond is not as easy as Mist might have thought. She soon discovers that Steve, Jessica and co. never learned to fly, but undeterred they set off to waddle on a great journey that takes them back to exactly where they started!