The Grand paradis is said to be one of the easiest four-thousanders and that is the one choosen by Carole Dechantre to share with the famous alpinist Jean Troillet.

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.