Thieves break into a scientist's laboratory to steal a secret formula, and in the process they kill his daughter. Enraged, he develops a formula that will turn an extremely ugly woman into a spectacular beauty, and then uses the woman to take his revenge on those responsible for his daughter's murder.

El doctor Boerner ha descubierto una magnífica fórmula, pero no se la quiere vender a la poderosa empresa Schneider. En reprimenda, asesinan a su hija. Ante esto, el doctor jura vengarse y para ello utilizará a una mujer apodada 'La Bruja'.