Justin Arnold, millionaire scion from New York has it all: lots of money, the splendid inherited mansion White Birches, faithful servants and a fiancée whom he loves very much but who unfortunately does not love him back, even though he is well aware of it.The weekend festivities at the millionaire's estate proceed as planned, until they are interrupted by an unexplained event: the disappearance of Justin from a locked room in his mansion. Justin is presumed dead, killed by an intruder. But why? And who? Detective Fleming Stone is called upon to solve this complicated and mysterious case.