When William Gridley arrives from the US in London, he rents part of Carly Hardwicke&#39s house from her and promptly begins to fall in love. Gridley doesn&#39t know that many people think she killed her husband but his boss, the American ambassador, knows and doesn&#39t take this &quotlapse of judgement&quot lightly. Since Carly is also American, Gridley saves his job by introducing her to the ambassador, who is promptly smitten and promises to help her. So when a Scotland Yard detective arrives, wanting to get to the truth one way or another, they say they&#39ll help him. And then the comedic complications really begin.