 A research scientist conducting experiments on a new anaesthetic finds herself being blackmailed by a women she accidentally knocked down with her car; the woman wasn t hurt, but a scheming attorney has convinced her she can get a lot of money for the "accident." Meanwhile, the scientist s research assistant, who is in love with her boss  boyfriend, arranges for an explosion in the laboratory that disfigures the scientist s face, in order to take the boyfriend away from her. The scientist has plastic surgery to make her look like the woman who tried to blackmail her - who while struggling with the scientist fell out of a window and was killed - and determines to get back her boyfriend and punish her scheming assistant.