Saffron's two sisters, Cadmium and Rose, and her brother Indigo were all named from a color chart by their mother Eve, a fine-arts painter. When Saffron, known as Saffy, discovers that her name is not on the chart, it soon leads to another discovery. She has been adopted.
Cadmium, Saffron, Indigo and Rose are as colourful as the paint chart that inspired their names. When Saffron finds that her name is not on the chart, she discovers that she was adopted. This is the start of her adventurous search for a stone angel that she remembers from her dreams.