Dan Webber, a sailor who has been away from home for many years and presumed dead, returns to his farm to find that his family is about to be evicted. Dan's sweetheart arrives with a baby who, unknown to Dan, is actually the child his his younger brother and the sweetheart's sister. Dan is able to save his farm when his horse wins a big race. Finally, it is revealed that Dan's brother is secretly married to the mother of his child.
Credits and plot summary for this film were obtained from a review in Kinematograph Weekly, a British trade publication. No American release date has been located for this title. It is possible that Firefly was the British release title of the 1925 release Just Plain Folks, which also starred Kenneth McDonald.