A mathematics professor with a fatal heart condition who receives a transplant. His life intertwines with a grieving widow and a fugitive driver, leading to a complex relationship, a failed revenge plot, and his eventual death from transplant rejection and a self-inflicted gunshot.
Paul carries the physical remnant of the man Jack murdered, linking their fates.
Paul and Cristina develop a deep romantic bond born from shared trauma and mutual dependency.
Explore the full interactive character relationship map of 21 Grams