Werewolf of London

During a trip to Tibet, botanist Wilfred Glendon is bitten in the hand by an unknown creature that looks like a wolf. After discovering the mysterious marifaza plant, whose flowers bloom only by moonlight, he returns to London. In his laboratory, Glendon is trying to revive the plant with artificial light. At this time, a reception is being held in his house on the occasion of the opening of the botanical garden, during which his wife, Lisa, meets with a childhood friend who unexpectedly returned from America, Paul.

Meanwhile, Glendon is visited by Dr. Yogami, who claims that they met in Tibet. Yogami, as it turns out later, is the creature that bit Glendon-a werewolf. He lets Glendon know that he, too, will turn into a wolf as a result of the bite. The only known antidote is an extract of that plant, marifase, which Glendon brought with him from Tibet, and which Yogami was also looking for (the plant he found died during transportation to Japan, or was completely used by him). But Yogami clarifies: the extract is only a temporary protection, an antidote, but not a medicine.

Glendon refuses Yogami's help, and he warns him goodbye: the werewolf instinctively seeks to destroy what he loves most. Confused and scared, Glendon panics and concentrates on his botanical experiments. When he is distracted to find out more information about werewolves, someone cuts off the marifaza flowers.

His wife, along with Paul, goes to a party at her aunt Hattie's, where, among other things, Dr. Yogami (whom she calls Yokohama) is invited. Glendon, already prone to jealousy, is born with the certainty that it was Lisa or Paul who cut the flowers. In the form of a wolf, he rushes after them. Sneaking into the house to a tipsy aunt, he scares her, but does not kill her.

The former head of Scotland Yard, Colonel Forsyth, who is also Paul's uncle, complacently notes that she drank too much, and does not believe in her story about the attack of a werewolf. The next morning, a Yogi who left the party on time reads an article in the newspaper about the murder of an unknown girl on the street. His conscience begins to torment him, because he secretly took the flowers away. The police are taking over the investigation.

Glendon is trying to find a way out of a nightmarish situation by renting a separate room. But the next night the conversion is repeated, he escapes and kills again. Yogami informs the police that the murders are a consequence of the existence of a werewolf, and that in order to stop them, it is necessary to take control of marifaza. Paul hardly persuades his uncle to check these statements. Glendon tries in vain to speed up the ripening of stubborn marifaza flowers, but one more night is needed. Terrified at the thought of what might happen, so as not to cause trouble this time, he rushes to Lisa's ancestral estate, Faldon House, where he asks the forester to lock himself in a room in the tower. But Paul and Lisa also come there for a night walk. In the form of a wolf, Glendon sees them carelessly walking through a dark garden. The desire for human blood drives him to the point that he starts hunting his wife Lisa and hunts until he is shot by Forsythe.