Lord Randolph and Lady Serena Buxton's orderly lives are upset by Pinkerton Agent Stuart Montgomery's unexpected arrival at their estate in England. And this is no ordinary social call! Montgomery is investigating four suspicious deaths at an American aviation company, and of the two remaining partners one is the old friend of Lady Serena's. Can Montgomery convince his friends to return to America with him in hopes of finding the missing piece to the puzzle that will help him close the case? Serena has her doubts. Her concern for her friend, Sir Hilary, is overlaid by her fear that Randolph may once again find his life in danger from an old adversary who once left him for dead. Does Montgomery really want their assistance? Or is his case just an excuse to renew a potentially scandalous association with her? Time is running out as events escalate revealing more secrets than ever suspected.