According to the CodeMovie

Basil Breckenridge, a broken old man on the verge of starvation, but concealing it because of his proud southern ancestry, is set upon by young ruffians on the street. The old man becomes infuriated and gives the young leader a shaking. His father, Ald. Connors, the city's political boss, happens along and attacks the old man, who strikes at him with his cane. The sword blade inside falls out and the police arrest him on the charge of assault with intent to kill.