Jerry Post and his sister Barbara are both broke. However, their mother is very wealthy. "The apple of death falls into three equal parts." Mrs. Post's twin brother has a good motive for her murder as well.
Lynn Halstead's body is found in the river. Her father identifies the body at the morgue, but it's not really Lynn Halstead. The real Lynn Halstead's body is later found.
Soon after John Welch is acquitted of killing his wife, he swears he's going to get the real killer. Larry Moore is soon found beaten up by John Welch, and later that day is found dead!
A serum has just been invented that can bring the dead back to life. When a criminal kills the inventor, he can bring back all the bad guys to form a gang of ghouls.