Did you know that many birds migrate at night and that they find their way according to the position of the moon and the stars? That some insects take several generations to complete their migration? That the albatross can fly for years without landing on land? Carried by the raging winds, tossed by the violent currents of the oceans, treading the burning sands of the desert... to feed themselves or give birth to their young, migratory animals compete in exploits. It is the migratory journey of twenty animals - fish, cetaceans, birds, insects or mammals - that we follow in this splendid documentary album.