Tommy Beresford and Tuppence Cowley are a real sweet couple. But there is one problem: they have neither money nor work and are always broke. Then the decision comes to their minds to open their own enterprise, “Young Adventurers Ltd.”, because they are the best at cheating. And here is the first order from a certain Mr. Whittington. The payment for the services is excellent, but the case is so strange that Tuppence decides not to reveal his real name and introduces himself with the name that he accidentally overheard Whittington talking to another person. And suddenly the customer changes his face, hurriedly leaves, for some reason giving Tuppence a large sum of money, and soon disappears without a trace from the adventurers’ horizon. Intrigued, Beresford and Cowley want to know who Whittington is and why he is so afraid of the name Jane Finn...