Why was Vigil in the Night unusual for Carole Lombard?

Vigil in the Night (1940) was unusual for Carole Lombard because it was a grim drama, which stood in stark contrast to the comedy roles for which she was primarily known and celebrated.12

In this film, directed by George Stevens, Lombard portrayed a noble and selfless nurse who dedicates her life to the poor after her sister accidentally causes a patient's death. Despite the film's uplifting conclusion, its dramatic tone was atypical for the actress, and it ultimately proved to be a box-office failure.12