In the bustling world of 1930s horse racing, a down-on-his-luck gambler named Sorrowful Jones finds himself in an unexpected predicament when a desperate bettor leaves his young daughter, Marthy, as collateral for a debt. Initially resentful of the situation, the tough but soft-hearted Jones reluctantly takes the girl under his wing, much to the surprise of his seedy compatriots. As Marthy's innocence and charm gradually soften the rough edges of Jones's associates, she becomes a beacon of hope and innocence in their otherwise dubious lives. Her presence begins to influence the gang, bringing an unanticipated warmth and sense of community that even softens the gangster known as Big Steve.

Meanwhile, the story takes a turn as Blackie, a kind-hearted gangster, develops a genuine affection for Marthy, and her welfare becomes a point of concern for those around her. Tensions rise when Blackie realizes the dangers that surround their lifestyle and the potential risks to Marthy's safety. As relationships deepen, a romantic interest emerges between Blackie and a club singer named Bangles Carson, adding complexity to the unfolding drama. The stakes are high as everyone grapples with their past choices and the impact these decisions could have on Marthy's future. What begins as an unwanted responsibility for Sorrowful becomes a journey of redemption and compassion, transforming the lives of all who encounter the little girl.