Mr. Jack is a gay dog. In Doctor Gallagher he has a friend after his own heart. The fact that they are married means nothing in their lives. They start out with their wives for an evening's entertainment. They start, that's all. As soon as their better halves get interested in the opera they give them the "slip." Then things happen rapidly. Doctor Gallagher gets into trouble with a chauffeur who tries to overcharge them. He is arrested and put under a big fine. Mr. Jack, through mixed identities, succeeds in getting a politician, whom he has cured of ailments, while posing as Gallagher, to use his influence in getting the Doctor out. Mr. Jack is not much of an M.D., but he is a considerable "fixer." He relieves a charming widow of a headache and all he uses is champagne. He is later made to realize that the delightful lady is somewhat of a "reliever" herself; his watch and diamond scarf pin being among the missing. Needless to say, he is suddenly attacked with one of the worst headaches of his gay career.