It's the beginning of a new year on Hazel Tree Farm, and with it comes a burst of new life.

Peter helps Dad to bring baby lambs into the world, while his sister Kate falls in love with next door's fluffy chicks – and one in particular!

But something is wrong with sheepdog Peg, and one stormy night, she runs away. Through wind and rain, the children race to find her before it’s too late.