For questions related to "21 Grams" (2013) starring Sean Penn, Benicio Del Toro, Naomi Watts, and directed by Alejandro G. Iñárritu

"21 Grams" (2013) is a crime/drama/thriller starring Sean Penn, Benicio Del Toro, Naomi Watts, and directed by Alejandro G. Iñárritu

Plot (from Wikipedia):

21 Grams revolves around the consequences of a tragic automobile accident. Penn plays a critically ill mathematician, Watts plays a grief-stricken mother, and Del Toro plays a born-again Christian ex-convict whose faith is sorely tested in the aftermath of the accident. The three main characters each have "past," "present," and "future" story threads, which are shown as non-linear fragments that punctuate elements of the overall story, all imminently coming toward each other and coalescing as the story progresses.