This is quite contrary to the methods employed by the renowned Dr. Ludwig von Saulsbourg (Mayne), who for four years has reaped a golden harvest out of the father (Prince) of the Sick-Little-Well-Girl (Davis), keeping the latter in dark rooms and feeding her drugs without end.

Dr. Jack has met the Girl once accidentally, and is overjoyed when he is called to prescribe for her, a proceeding that results in both falling in love.

Dr. Jack, who holds that a little excitement is all the patient needs to make her perfectly normal, arranges a night alarm for the occupants of the home.

He dons a wig and hat and, thus disguised, makes unexpected appearances in various parts of the establishment, throwing everybody into spasms of momentary terror.

In the long run he reveals himself to the Girl, her father realizes that she is cured, von Saulsbourg is required to make an undignified exit, and the two lovers are happy.