Stone Hoof, the hardest worker in the Canterlot Mines, will finally marry the mare of his dreams, but what happens when another unicorn comes and tries to take that away from him? A dual, of coarse. The two must do battle if anypony is to marry River Runner. This right must be performed, but what happens when Stone Hoof's opponent is a full blooded unicorn, and he is only half unicorn himself?