As Blueberry recovers from the tragic events on the banks of the Niagara River, he is entrusted with a dangerous mission. General Sheridan's niece was taken from his college by an illuminated preacher and his sbires who want to avenge himself of a massacre perpetrated on civilians. As a ransom, they demand the surrender of the northern armies and the resignation of President Lincoln. Blueberry starts to pursue them without doubt that he is not the only one on the track and that he will again lay his boots in a mortal trap. Michel Blanc-Dumont and François Corteggiani fully justify their reputation as great masters of comic adventures with this haletante story that will spread over two volumes.