New York City society girl Evelyn Whitney, engaged to a wealthy young man, determines to prove that she can make her own living on the Lower East Side. After failing as both a factory worker and a waitress, she succeeds as cafe singer Mary Malone, and falls in love with former gang leader Larry Marshall. Stella, a jealous rival, attempts to stab Evelyn and is shot by Larry. Evelyn flees to her home, where she suffers from a lengthy illness. Upon learning that Larry is on trial for murder, she testifies on his behalf and assures his acquittal. Soon after, they are married.