"The Mortal Storm" (1940) was the last movie Sullavan and Stewart did together. Sullavan played a young German girl engaged in 1933 to a confirmed Nazi (Robert Young). When she realizes the true nature of his political views, she breaks the engagement and turns her attention to anti-Nazi Stewart. Later, trying to flee the Nazi regime, Sullavan and Stewart attempt to ski across the border to safety in Austria. Sullavan is gunned down by the Nazis (under orders from her ex-fiancé). Stewart, at her request, picks up the dying Sullavan and takes her by skis into Austria, so she can die in what was still a free country.