Two hearts against death...giving all to smash the mysterious crime that mocked the law- and almost defeated justice.

At a reception given by Arthur Hilton at his Sussex home the conversation turns to the subject of danger, with Hilton recalling a case in which he was involved as a Natal police commissioner. In it there were three guilty persons, but only one of them was hanged; the other two were sentenced to long terms, vowing vengeance on Hilton. Unknown to him, the same two men are now among his guests, and are determined to have their revenge.