Ernest Bourbon -- that's Onesime -- has decided to learn to box, for some reason, and also fight an American fighter who's touring France.
Jean Durand's unit at Gaumont produced westerns -- called 'Westerns-Camembert' -- and a lot of short comedies. Onesieme was for the ones that used a lot of trick shots or special effects for flights of fancy. There's one here that shows up in the match, but until them, it's mostly pummeling of Bourbon in the bone-breaking style of slapstick favored by the Europeans.