Several months after Maclear’s father (who was a famous journalist) dies, she decides to take a DNA test to find out more about her family health and personality history, mainly because of the stories about a particular grandmother. She wonders if certain traits she and her sons have might possibly be inherited. The results of the test are a shock. Her father, the father she adored, who raised her and adored her, is not her biological father. At first, she thinks perhaps it was a sperm donor, but then she discovers this is not the case. Through the DNA test and her detective work, she finds two biological half-brothers (she was an only child before this discovery) who are willing to communicate with her, send her photos, etc. She tries relentlessly to acquire more information from her mother, who is often unforthcoming or tells her contradictory information. Then her mother gets dementia.

This is also a story of plants, of gardening. Both she and her mother are amateur botanists and expert gardeners. When nothing else works in their mother-daughter relationship, their love of plants and gardening holds them together. Even with dementia, her mother knows plants. Their other joint endeavor is ink drawings and love of art.

Additionally, this is the story of family, family secrets, inter-racial marriage, and challenging relationships. Kyo’s mother is Japanese living originally in England and later in Canada who often struggled with her status as a Japanese immigrant. Her “real” father, the one who raised her, was of British and Irish descent; her biological father was a Jewish formula one race car driver.