Roy, a captain in the Rendleshire Fusiliers on his way to the front, and Myra, a ballerina, serendipitously meet crossing Waterloo Bridge during an air raid, striking up an immediate rapport while taking shelter. Myra invites Roy to attend that evening's ballet performance and an enamored Roy ignores an obligatory dinner with his colonel. Roy sends a note to Myra to join him after the performance, but the note is intercepted by the mistress of the ballet troupe, the tyrannical Madame Olga, who forbids Myra from having any relationship with Roy. Despite the admonition, they meet at a romantic night spot. Roy has to travel to the front immediately and proposes marriage, but wartime circumstances prevent them from marrying immediately. Roy assures Myra that his family will look after her while he is away. Madame Olga learns of Myra's disobedience and dismisses her from the troupe along with fellow dancer Kitty when she scolds Olga for spoiling Myra's happiness.
