The future of Marguerite, a brilliant student in Mathematics at the prestigious Ecole Normale Supérieure, seems all planned out. The only woman from her year, Marguerite is finishing a thesis she has to present to an audience of researchers. On the big day, a mistake shakes all her certainties and all her foundations collapse.

While he is overwhelmed by his debts and coping with his dying mother, Arnaud meets Momo, a magician from his neighborhood with unusual and mischievous behavior. This meeting will not ward off bad luck, quite the contrary. But perhaps the discovery of an old flute may be the solution to all their problems and change their destiny?

After completing his military training, young Léo, a taciturn soldier with family problems and secret addictions, is assigned to one of the units that patrol the streets of Paris in search of possible terrorist threats as part of Operation Sentinelle.

Emma loves Sammy, who loves Cyril, who loves her back. What could have been a love story at the end of the last century is blown apart by the arrival of AIDS. Expecting the worst, each character's destiny takes an unexpected turn.