During World War 2, a small plane off the south coast of America is low on fuel and blown off course by a storm. Guided by a faint radio signal, they crashland on an island. The passenger, his manservant and the pilot take refuge in a mansion owned by a doctor. The easily-spooked manservant soon becomes convinced the mansion is haunted by zombies and ghosts. Exploring, the 3 find a voodoo ritual in the cellar, where the doctor is trying to acquire war intelligence by transferring personalities into his zombies. But the interruption causes the zombies to turn on their creator.
Young workers are dying because of a mysterious epidemic in a little village in Cornwall. Doctor Thompson is helpless and asks professor James Forbes for help. The professor and his daughter Sylvia travel to Thomson. Terrible things happen soon, beyond imagination or reality. Dead people are seen near an old, unused mine. Late people seem to live suddenly. Professor Forbes presumes that black magic is involved and someone has extraordinary power. He doesn't know how close he is: the dead become alive because of a magic voodoo-ritual, and so they must serve their master as mindless zombies…