"Heiress Kathleen Manton was a stowaway. When Clive discovered her, he also found some of her jewelry, which convinced him that she was a thief. But Kathleen was a very beautiful woman; Clive was anguished by the thought of turning her over to the authorities. Then Fate took a hand and set them on the road to an adventure which was not only risky but quite risque."
Used availability for Maysie Greig's Unmarried Couple