12 year-­old Adama lives in a remote village in West Africa, sheltered by the cliffs. Out beyond lies "the world of wind," the kingdom of wicked spirits hungry for war. When his elder brother Samba suddenly vanishes from the village, Adama decides to set off in search of him, crossing into a Europe in the grip of World War I.

The 8-year-old Aida lives in an apartment in the Parisian suburb. The daily life of Aida and the whole family is overwhelmed when her father comes back from Senegal, their country of origin. Actually, he did not come back alone. He returned with the young Senegalese Rama whom he introduced as his second wife. Aida is very sensitive to her mother's distress. She decides then to get rid of the new visitor.