The land of Yucatan is threatened by famine. Agricultural scientist Barry Paxton meets Mayan princess Janva. Together they travel back in time and discover vast grain supplies held back by thieving king Tolextl.; The hobo Matty Ross meets a conclave of witches in the woods and is tricked into taking their blood money - and thus forfeiting his life. He is saved by witch-hunting townspeople, but pays for his sins by going blind.; Four GIs run into a vampire trap in a German castle. They get slaughtered one by one. The last one manages to stake the vampire and shoot down her goulish henchmen.; Ralph Dana discovers a parallel universe behind a magic mirror, ruled by the devil. Dana fabricates more of Mephisto's mirrors and lures his relatives into the mirror world, so he can dig up a family treasure alone. His plan fails miserably and he is caught in the mirror.; "When Kublai Khan was the emperor of the great Mongolian empire in 1259 A.D., his conquest of China brought him great wealth..." The ghost of the Khan guards his hidden treasure in person, bringing down an avalanche on all intruders.; "In a certain section of London, there is a huge, old prison still in use. Strangely enough, one cell of this prison is never used..." Because an "old hag" hanged herself in that cell, every other inmate tries to commit suicide this way as well.