One night at Bay Farm, three lambs are born. The mother sheep has only enough milk for one lamb, so the farmer's wife decides to look after the other two herself. Tig and Tag soon show their mischievous natures, and get into all sorts of trouble. But when a dog comes to threaten the rest of the sheep, Tig and Tag know exactly what to do, and save the day.

It's not long before the naughty lambs are in trouble again as they try to avoid getting dipped and sheared. Hiding on an island might seem like fun, but they soon find it isn't, and realize they'd rather be at home after all ...