In the midst of World War II, Sherlock Holmes rescues the Swiss inventor of a new bomb-sight from the Gestapo and brings him to England, where he shortly falls into the clutches of Professor Moriarty.

Set in Paris, this romantic comedy revolves around the beautiful estranged wife of a wealthy banker who hides a handsome and fiery Communist fugitive in her apartment.

Nekhludoff, a Russian nobleman serving on a jury, discovers that the young girl on trial, Katusha, is someone he once seduced and abandoned and that he himself bears responsibility for reducing her to crime. He sets out to redeem her and himself in the process.

After her brother's death, Roma Courtney becomes the heiress to his fortune. When fake psychic Paul Bavian claims to have a message from Roma's dead brother, he coaxes Roma into participating in a séance. Although Roma's fiancé, Grant, first believes the séance is nothing more than a scam, he eventually realizes that the vengeful spirit of an executed murderer has possessed Roma's body.

In Haiti, a wealthy landowner convinces a sorcerer to lure the American woman he has fallen for away from her fiance, only to have the madman decide to keep the woman for himself, as a zombie.