A girl who takes her fine little mare to the blacksmith's for new footwear, does not know that the strapping, sinewy smithy has a warm spot in his heart for her; nor does she find out until long after he has learned to just bear the heart-pang as though it were part of his daily life. The girl has a lover, a fine, elegant young chap of her own station in life, who takes his horse to the same smith for attention. This fine morning the young couple are seen meeting at the blacksmith's shop, and later they canter out on the boulevard together. A little love-making adds to the pleasure of the ride, and soon we see the lovers part; the girl rides up a beautiful boulevard and suddenly her mount rears, runs away and finally throws her onto the ground at the side of the road. The riderless horse then turns about and runs straight to the blacksmith shop; the smith knows the mare and looks out expectantly for the owner, but he is greatly surprised when she does not appear and becomes alarmed. He mounts the horse and, riding back to the driveway, discovers her lying on the ground painfully hurt. In his strong arms she is carefully borne home, and the smithy runs for the doctor. The girl's lover also comes on the scene and. with an important air, puts aside the blacksmith's attentions, not even allowing him to go into the sick room. The physician in attendance announces that the girl is seriously hurt and requests that another doctor be called in consultation. The girl's parents and her sweetheart are gathered round the bed when the second doctor, a specialist, tells them that the girl, having been greatly weakened by the loss of blood, her system must be reinforced by the transfusion of the blood of another. Naturally, he turns to her lover as the most likely candidate for the sacrifice, but the latter shows his displeasure at the idea plainly; thinking to redeem himself, however, he suggests that he will procure a substitute. Going out of the house, he soon returns with the blacksmith. The latter is only too glad to make the sacrifice, and in a little while we see the operation being performed. After the antiseptic cleaning and the application of the local anesthetic, the forearms of both the girl and the blacksmith are cut at the arteries and a tube inserted between the two incisions, and the strong, healthy blood of the blacksmith flows in a steady stream into the system of the suffering girl. The operation is successful, and we now see the young lady convalescing, with her sweetheart beside her. It is the first time he has seen her since the operation and she thanks him for the sacrifice that she thinks he has made. Knowing that she will eventually learn the truth, he tells her that it was the blacksmith who gave his blood as a contribution to her health. She is amazed, astounded, bewildered. Leaving her lover abruptly, she hurries straight to the shop, and what transpires there shows very plainly that the blacksmith has not made his sacrifice in vain.