Lizzie Flowers has had a hard life but she is full of East End grit. In the bleak years after World War I her family faced desperate times, but when barrow-boy Danny Flowers asked her to leave for a better life in Australia, she stayed true to her family's roots. She married Danny's brother Frank instead, a decision she bitterly regretted. Frank's death, and her success running the greengrocer's, gives Lizzie independence at last. And Danny has come back to marry her. But as their wedding day dawns, an unwelcome guest means life will never be the same again.