The film follows the saxophone player Clyde, who busks on the San Francisco Bay waterfront. One night, he meets Flowers, and teaches her to dance, but finds that "Blackjack" (Eddie Gribbon), the leader of a ruthless gang, is also in love with her. Despite the intense turf war between "Blackjack" and a rival gangster named Mike Luego (Walter Long), "Blackjack" wins the heart of Flowers and marries her, but without consummating the marriage.[5] Clyde is eventually able to win "Blackjack" over however, and "Blackjack" sacrifices himself to protect Clyde and Flowers from Luego.