A boy on vacation in Haiti saves a native from drowning and is rewarded by the victim's grateful mother with indoctrination into the rites of voodoo, which he uses when returning to the United States to increasingly nefarious ends.
Bland weakling Robby is ignored and ridiculed by his family and peers for being nondescript and dull. When he decides to kill the local pretty girl Mary to prove he can be dangerous and exciting, no-one believes he did it. Distraught at not getting any respect or credit for being bold and daring, Robby then hangs himself out of depression.
A stage magician's apprentice purposely lets his master die doing a escape so he can take over his act. The magician returns from the grave to exact revenge.