Diamond mines seem to gather blackguards like a magnet gathers steel dust. The chances of obtaining a stone whose sale will make the vendor rich for life, attracts all those to whom honest work is abhorrent. Money is easily won and easily lost, and when it cannot be made on the "I.D.B." the independent diamond business, which consists of selling stolen stones. Well, there are generally "pigeons" to be plucked. This engrossing story tells how a scoundrel after fleecing his victim, kills him and impersonates him with the idea of gaining more money. Nemesis, however, finally overtakes him and he meets his death in the very same river in which he had thrown his earlier victim.—Moving Picture World synopsis