Marguerite and Margot are both twelve years old, each with their family, their friends, their problems... And their times. Because one lives in 1942 and the other in 2018. But that's without counting on a mysterious magic trunk that transports them each to the time of the other. Margot and Marguerite have another point in common: their father is no longer there, having disappeared in the middle of the Second World War or no longer living at home. 70 years apart, they embark on a great adventure to find their gifts, exploring history, but also the memory of their families.