A band of murderous cowboys has imposed a reign of terror on the town of Warlock. With the sheriff humiliatingly run out of town, the residents hire the services of Clay Blaisedell as de facto town marshal. He arrives along with his friend, Tom Morgan, and sets about restoring law and order on his own terms whilst also overseeing the establishment of a gambling house and saloon.
American tycoon George Harrison, his beautiful wife, Mona, and deep-sea diver Jeff Clark are off the coast of Africa hoping to salvage a fortune in diamonds at the bottom of the sea near the voodoo-haunted island of Mora Tau, and are joined by an English girl named Jan. The treasure is reported to be guarded by Zombies, walking dead-men doomed to roam the earth until men stop trying to find the sacred treasure. Here, they are walking the sea-bottom, and there is a large conflict of interest between them and the treasure-seekers.
Ex-Confederate Bedloe Mason and his four sons ride into a small Western town with robbery in mind. Hearing a suspicious "click," Wes Mason whirls and shoots dead a boy playing with a cap pistol. The Mason clan then flees but Gray Mason, feeling remorse, decides to return to the town. He winds up at the home of John and Nora Willoughby who, unknown to him, are parents of the dead boy. Nora recognizes him as one of the Confederates but keeps quiet, wishing to avoid more violence. However, when John learns of Gray's true identity, he determines to avenge his son's death
Down-and-out artist Joe Manning (John Bromfield) wakes up from a night of drunken revelry in a jail cell, where he's being held on suspicion for the murder of a nightclub singer.
