Eva Kershaw thought she would never marry, and is happy living a quiet life with her dear friend Alice. But Alice is ill, and her nephew, Gus, has thrust himself into their household. Alice's dearest wish is that Eva should not make the same mistakes she did, and she alters her will so that Eva and Gus are strongly compelled to marry. Eva obliges to fulfil her dead friend's wishes.
But Gus is not all he seems to be: he is not Alice's kind nephew, but a robber, confidence trickster, and not even Gus Blake. And Eva is in terrible danger.