Mateo and Rufus meet under extraordinary circumstances and quickly develop a deep friendship, showing that meaningful relationships can form at any stage of life, even in the face of death.

The novel confronts readers with their own mortality and raises questions about how one would spend their last day, encouraging people to live consciously and appreciate the preciousness of time.

The certainty of death forces Mateo and Rufus to contemplate life's meaning, reflecting on their past, dreams, and what truly matters, showing that life's meaning often lies in small moments of happiness and connection.