|Alice Terry||Margaret Dauncey|
|Paul Wegener||Oliver Haddo, the magician|
|Iván Petrovich||Dr. Arthur Burdon|
|Firmin Gemier||Dr. Porhoet|
|Gladys Hamer||Susie Boud|
Brilliant surgeon Dr. Arthur Burdon saves sickly beauty Margaret by performing a daring operation. Afterward, the two begin to fall in love, until the mysterious Oliver Haddo seemingly sweeps Margaret off her feet. But this is no ordinary affair -- in fact, Haddo is a sorcerer who put a spell on the young woman to lure her into his hideout, where he plans to remove her heart and blood as part of a devious experiment to create artificial life.