A mild-mannered banker is forced to masquerade as a notorious gangster and pimp.

Everyone has a secret. Twins Sarah and Gaëlle near 25; for ten years, Sarah has been a fundamentalist Carmelite in a Brazilian convent, and Gaëlle has been in prison for a heinous crime. Sarah comes to the attention of Fr. Joachim, a priest and physician; he can find no cause for her debilitating abdominal pain. When Sarah and he are transferred to Paris, Joachim looks for Gaëlle, now on probation and finding no respite from society's approbation. An enterprising reporter is digging into Gaëlle's life, the mother superior of Sarah's convent hovers over her, and Joachim investigates the phenomenon of twin's symmetry. Is there any release from the past?

The week of his 18th birthday, Bennie, who's a waiter on a cruise ship, has a layover in Buenos Aires. He seeks out his older brother, Tetro, whom he hasn't seen in years. Tetro, who lives with Miranda, is a burned-out case; he's hot and cold toward his brother, introducing him as a "friend," refusing to talk about their family, telling Bennie not to tell Miranda who their father is. Thoughts of their father cast a shadow over both brothers. Who is he, and what past has Tetro left behind? Bennie finds pages of Tetro's unfinished novel, and he pushes both to know his own history and to become a part of his brother's life again. What can come of Bennie's pushing?