At the start of the school year, Benjamin and Noé, with very different characters, find themselves in the same 4th grade class, at the discreet scheme of their mother Sali. The latter is in full search of work after having devoted her last years to the education of her children. Paul continues his activity as a florist and can always count on the support of his best and whimsical friend, Manu. But when Lazare, to whom Paul had not spoken for years for an unknown reason, arrives unexpectedly from Côte d'Ivoire, this joyous balance is upset!