Watch 21 Grams

The lives of three people are irrevocably changed in the aftermath of a horrific car accident in 21 Grams, an American film by Mexican director Alejandro González Iñárritu. Told in a non-linear format, the plot weaves in and out of the lives of Paul (Sean Penn), a mathematics professor in desperate need of a heart transplant due to a terminal heart condition; Jack (Benecio Del Torro), a former convict using his born-again Christian religion as a way to cling to sobriety and stay out of jail; and Christina (Naomi Watts), a recovering drug addict who finds her new, stable life as a wife and mother coming apart following a personal tragedy.

Paul, Jack and Christina are each shown in non-chronological scenes interwoven from past, present and future points in their storylines. This format slowly reveals how their lives are interconnected with each other, and it ultimately merges into a cohesive plot as the film concludes.