Filmmaker Hugo Haas unfolds his usual cautionary old man-young woman story in One Girl's Confession. Perennial Haas leading lady Cleo Moore stars as Mary Adams, whose first step on the road to ruin is a $25,000 robbery. Mary hides the money, then confesses to the crime, secure in the belief that she can dig up the loot upon her release from prison. A few years later, Mary is placed on probation, whereupon she takes a waitressing job at the seaside eatery run by Dragomie Damitrof (Haas). A chronic gambler, Damitrof is on the verge of losing his café when Mary offers to loan him money. When Damitrof begins spending cash like a sailor, Mary is convinced that he's located her hidden loot, whereupon she hits him on the noggin and leaves him for dead. Deciding that the money is too much trouble, Mary donates the rest of the loot to an orphanage and confesses to Damitrof's murder. But that's not the end of the story ....