Ruby Johnson used to live on Manhattan’s West 74th Street, with her parents. But the family lost everything, including their home, due to her father’s gambling. Now she works on that very street as a maid to some of the wealthy families.

Ruby knows all their precious secrets, so when she witnesses a murder in one of the homes, she sees an opportunity to make some cash and change her mother’s life – and her own!

Ruby knows the victim, and the killer, and so it is that she makes an anonymous call to the police and names the killer, but she’s telling a lie, and, as we eventually find out, she has a very good reason for doing so…