Enredo

A submarine coming into port is seen gliding smoothly on the water and the little rowboat which is to bring the captain of the vessel to his post is seen leaving for shore. We see the dashing young officer bidding his love adieu, and then seating himself in the frail craft is soon once more on duty at the wheel. Away they go, and reaching the wide sea the ship gives a lurch and disappears under the water. The submarine trip is progressing most successfully when all at once a terrible commotion takes place in the little steel craft. It is evident a terrible accident has occurred; the machines soon stop their throbbing and down goes the ship to the bottom of the sea. The poor sailors inside are seen gasping for breath, and the desperate efforts of the divers sent down to rescue the submerged men being of no avail, the sailors lay down to die in their steely prison. As the death agony creeps over the prostrate forms and as their souls are about to depart for a better world, each sees the ones nearest his heart at home. One of the sailors beholds his sweetheart thinking of him as she stands in front of her cottage door, the engineer sees his beloved wife and child reading one of his letters and, taking down his picture from the wall, they fondly kiss it; to the captain appears his bride arrayed in wedding clothes and looking at her dying lover with loving eyes. The last scene of this highly tragic film shows the grave erected to all the brave soldiers and sailors who perished in this terrible accident for their country's sake.—Moving Picture World synopsis