Haunted by the anniversary of his sister's death, nineteen-year-old Jonny Dart seeks closure for a traumatic accident that remains fractured in his mind. Jonny attempts to locate his sister's former best friend to reconcile his guilt, but his search leads him to Sophie, an elderly woman struggling with the onset of Alzheimer's disease. As a young man feeling alienated from his own life, Jonny finds an unexpected sanctuary within Sophie's chaotic, cat-filled home. The narrative follows their unlikely connection as they navigate the shifting boundaries between their individual pasts and the present reality, forcing both to confront the nature of memory and identity.

This work is widely regarded for its sensitive and nuanced portrayal of the cognitive decline associated with Alzheimer's disease. Critics often highlight the author's ability to weave complex psychological themes into a narrative accessible to younger readers without sacrificing depth. The interaction between the teenage protagonist and the elderly woman is frequently cited as a poignant study in empathy and human connection. The prose is noted for its lyrical quality, which effectively mirrors the protagonist's internal struggle with his own fractured recollections. The story remains a significant example of how literature can bridge the gap between disparate life stages through shared vulnerability.