The novel is written first-person from the perspective of a dog Enzo. The dog’s owner is a racecar driver Denny Swift, and he has a daughter Zoe and a wife Eve. Eve eventually dies of brain cancer and the grandparents fight a long legal custody battle over the custody of Zoe, believing that Denny is an incompetent parent. In the end Denny wins and the dog dies.
One of the main themes in this book is the virtue of staying calm. When driving in the rain, the racecar driver must take into account the various road conditions. When the car accidentally veers off track, he must calmly assess the situation and act accordingly, otherwise the car will crash if he just panics. Denny applies these principles to real life and similarly achieves a good result.