The mysterious "K" takes a humble job and falls in love with his landlady's daughter, Sidney Page. Sidney discourages her boyish admirer, Joe Drummond, and seeks training as a nurse. Infatuated with the head surgeon, Dr. Max Wilson, she accepts his proposal, which infuriates nurse Carlotta, who also loves Max. Carlotta lures Max to a roadhouse, where Joe, mistaking her for Sidney, shoots Max. K appears and, assuming his true identity as the famous Dr. Edwards, saves Max's life by performing his "Edwards operation."
Mildred Harris
as Sidney Page
True Boardman
as 'K'
Alan Roscoe
as Dr. Max Wilson
Zella Caull
as Carlotta
Carl Miller
as Joe Drummond
