Marco, an Italian engineer comes from Milan to Santo Domingo, Haiti to continue the construction of a dam. The predecessor, Kluger, has disappeared without a trace and he would take his place. When he arrives, his wife Laura is there waiting for him and the two - along with their guide Romero. They go to the small, isolated jungle shack where Kluger was staying before he vanished. The couple is soon involved in mysterious voodoo rituals carried out by the Haitian religious leader, Balaga who is against the work. Meanwhile, the ghost of Kluger warns him about completing the work. Only thanks to the intervention of the police Laura, fascinated by the rites, is saved and brought back to Italy.