A terrible curse, which was launched on the verge of death from major Rosse McGuire, seems to come true sixty years after the tragic events of the War of Independence. From a mass grave in the depths of the forest, it shows the ghosts of the slain soldiers. Zagor and Chico must first earn the trust of terrified residents of Rockford, then find out what lies behind this dark mystery. Only in this way the Rosse will not come back to kill again!
Zagor and Chico sailing on the Lake Ontario find a refuge in the ruins of the fort from the "Il comandante Mark".