Shrewd crook Boston Blackie is determined to go straight. At a celebration held on the eve of his marriage to Mary Dawson, Fred the Count plants a stolen jewel and Blackie is arrested and sentenced to twenty years in jail. Fred the Count tries to win Blackie's fiancée, but the honorable Mary rejects him. Blackie's only hope for escape is from the hospital, so he manages to get into a weakened state. He escapes from the hospital, but is trailed by the warden. Blackie refuses to shoot the defenseless man, and the warden recognizes Blackie as an honorable person and allows him to escape. Blackie frames the Count, and leaves for Honolulu with Mary
When a bank is on the verge of collapse, its president, George Fuller, uses his own fortune to cover its losses. Unknown to Fuller, however, Monroe Simmons, his vice-president, is undermining the bank for his own purposes. Then Tom Williams, who is in love with Fuller's daughter Ethel, asks his uncle, famous detective "Whispering Smith," to investigate the case.
Naomi Sterling and John Bancroft are lovers. The girl loves frivolous things and Bancroft, a divinity student, finally estranges himself from her by his continual efforts to preach to her. Attracted by Hugh Wiley, a gambler, from a nearby city, Naomi finally elopes with him and eventually becomes known as the gambling queen.