Mary Rafferty comes from a poor family of steel mill workers in 19th Century Pittsburgh. Her family objects when she goes to work as a maid for the wealthy Scott family which controls the mill. Mary catches the attention of handsome scion Paul Scott, but their romance is complicated by Paul's engagement to someone else and a bitter strike among the mill workers.
Unfortunately the movie The Valley of Decision is not yet available on HBO Max.
| Writing | Sonya Levien | Screenplay |
| Camera | Joseph Ruttenberg | Director of Photography |
| Production | Edwin H. Knopf | Producer |
| Editing | Blanche Sewell | Editor |
| Directing | Tay Garnett | Director |
| Sound | Herbert Stothart | Original Music Composer |
| Costume & Make-Up | Irene | Costume Supervisor |
| Writing | John Meehan | Screenplay |
| Writing | Marcia Davenport | Novel |
| Art | Cedric Gibbons | Art Direction |
| Art | Paul Groesse | Art Direction |
| Art | Edwin B. Willis | Set Decoration |
| Costume & Make-Up | Jack Dawn | Makeup Designer |
| Costume & Make-Up | Sydney Guilaroff | Hair Designer |
| Costume & Make-Up | Florence Erickson | Hairstylist |
| Production | Walter Strohm | Unit Manager |
| Directing | Marvin Stuart | Assistant Director |
