This Depression-era romantic drama, which offers a surprisingly potent and unsentimental view of the economic hardships of the time, stars Spencer Tracy as Bill, a rough-hewn laborer struggling to get by and sleeping in a Hooverville shack.
Bill meets Trina (Loretta Young), a sad and desperate young woman with no prospects and nowhere to go; her plight touches his heart of stone, and he allows her to stay with him. Bill picks up work where and when he can, while Trina tries to turn their hovel into a home.
Bill soon makes the acquaintance of Fay LaRue (Glenda Farrell), a brassy showgirl whose career is on the way up and wouldn't mind if Bill tagged along. But Bill learns that leaving Trina behind won't be as simple as he thought.
Trina is pregnant with his child, so he ends up planning a dangerous robbery in hopes of raising enough money to provide a proper home for Trina and the baby.
Dealing with tough material in an adult manner, A Man's Castle was considered quite daring in its day. A year after its release, Hollywood adopted the Production Code that prohibited the depiction of unwed cohabitation and premarital pregnancy (among many other things), which would have made this a very different film.