Set in Mexico City, Carlos Reygadas's sexually explicit drama centers on a man in turmoil over his past actions. Chauffer Marcos feels compelled to reveal a dark secret to his boss's daughter, Ana, a wealthy woman who works as a prostitute just for the thrill of it. Marcos confesses that he and his wife committed a crime that ended in horrible tragedy. Haunted by his past, Marcos searches for redemption.

80-year-old Thomas recounts his childhood and middle age through a series of flashbacks and dream sequences. Thomas believes he’s been taken away from a better life at birth; following a hospital fire, he vividly recalls being swapped with another new-born, and subsequently grows up in a poorer neighbouring household.