At Léon Blum High School in Créteil, France, a history teacher decides to have her weakest 10th grade class participate in a national history competition.

Home cook Rachel, a sort of Ma Dalton, has raised her sons Sam and Jeremiah, and her grandson, Nathan, in the cult of conning. From bad plans to petty theft, this friendly family of broken arms is always after the big score. Luck or fate, during a burglary, they steal a painting by Tamara de Lempicka without knowing its value. Céleste, a shrewd and charming detective, sets out in pursuit.

Follows the incredible story of a 1942 effort to to save over 100 Jewish children from a deportation camp just outside of Lyon.