During an earthquake relief effort a mythical Medusa creature is released on a Greek island. After a first killing spree the island is evacuated by ship. The gorgon comes aboard, but brave lieutenant Miller can trick the medusa - like Perseus did centuries before him.; Dr. Drew investigates the Wainwright building wherein the elevator boy found a non-existent 13th floor. He witnesses ghosts reenacting crimes of the past and the collapse of the building.; Having lost his wife on the operating table, Doctor Renick loses faith in his abilities. When a young boy has an accident, Renick is the only one able to help. Assisted by his wife's lovely ghost he can save the child.; Two students stumble upon the haunted “Halfway House” where gangsters used to meet and mingle. They are being chased by ghosts, but manage to escape.