Jonathan is a very lonely man. One day, he gets a visitor in his house: a young woman who, through a jarring turn of events, ends up dead. He does not report it because he is happy to have a friend, but now the body begins to decay.
While on a botanical expedition in Tibet Dr. Wilfred Glendon is attacked in the dark by a strange animal. Returning to London, he finds himself turning nightly into a werewolf and terrorizing the city, with the only hope for curing his affliction a rare Asian flower.
