Poor Bessie MacGregor is struck by the automobile of wealthy Mrs. Templeton Orrin and is taken home to live with her. But Bessie leaves when Mrs. Orrin's brother, J. Warburton Ashe, trifles with her love. Thief Tony Pantelli befriends her in the tenement where she finds a room, tries to obtain money for her care from Ashe, and, failing, steals a goblet that Ashe has brought home from England, thinking it may be the Holy Grail. The goblet, which gives off a glow and is reputed to have healing powers, is recovered, stolen again, again recovered and stolen, and finally lost in a river. Meanwhile, Ashe exonerates Tony in night court, realizes he really loves Bessie, now cured, and is reunited with her.