Yorkshire, 1946.

At last, Sonny and Rachel Cowgill hear the news they've been so desperate for. Their son Mark, who was injured in the very last days of the fighting, will make it home in time for Christmas. But their youngest son Billy has not been so lucky. He was declared missing in action in Crete and is presumed dead. Sonny and Rachel are learning to give up hope of seeing him again.

Meanwhile, in Australia, Luke Fisher returns from the German prisoner of war camp where he was interned. His beloved fiancee Isabella Finnegan is waiting for him. But all is not well. Luke discovers that one of the Fisher Spring mining companies has been illegally poisoning the plant's water, making the local population seriously ill. Including his fiancee's mother.

Can Luke put things right to rescue his loved ones - and his business - in time?