Tex, Carson, Kit and Tiger Jacks march towards the Seminole camp, in the heart of the Florida swamps, continues amid a thousand dangers! Yama and the priestess, Loa, her accomplice, control the action of a band of bellicose blacks, followers of voodoo, led by their trusted Thomas, from the bridge of a gloomy sailing-ship. Having arrived at the Indian village, the pards learn of the horrible end of the sachem Yampas and head for the ruins of Baron Samedis castle just in time to fall into Mephistos sons trap!