Flora Hawks is in love with the overseer of Tarzan's African estate. After a search for a legendary city of diamonds, Tarzon races with his pet lion Jad-bal-ja to save Haws from being sacrificed to a lion-god.

When Pollyanna is orphaned, she's sent to live with her crotchety Aunt Polly. Pollyanna discovers that many of the people in her aunt's New England hometown are as ill-tempered as her aunt. But Pollyanna's incurable optimism - exemplified by her "glad game", in which she looks for the bright side of every situation - brings a change to the staid old community.

Young couple Madeleine and Neil are coaxed by acquaintance Monsieur Beaumont to get married on his Haitian plantation. Beaumont's motives are purely selfish as he makes every attempt to convince the beautiful young girl to run away with him. For help Beaumont turns to the devious Legendre, a man who runs his mill by mind controlling people he has turned into zombies. After Beaumont uses Legendre's zombie potion on Madeleine, he is dissatisfied with her emotionless being and wants her to be changed back. Legendre has no intention of doing this and he drugs Beaumont as well to add to his zombie collection. Meanwhile, grieving 'widower' Neil is convinced by a local priest that Madeleine may still be alive and he seeks her out.