Colombine finally wants to know who her father is. But her mother vehemently refuses to tell her. With the help of Mathilde the greengrocer, Colombine obtains a magic potion that transports the 13-year-old several months back in time to the "Fête des Vignerons" wine festival in Vevey. There, Colombine must summon up all her courage to uncover the secret of her father.

Three women, three generations, two secrets. In the early 1970s, a bomb exploded on board the Swissair flight 330 to Tel Aviv. Isabelle's husband also died. The young, very pregnant widow feared that her lover, the Palestinian activist Djibril, might be entangled in it ... Now, 47 years later, Isabelle finds out that her granddaughter Anaïs has converted to Islam. But why does the young student keep her new faith secret from the family? Anaïs's mother, Léa, immediately rings the alarm.