Boxer Joe Palooka steps into the ring after a friend's dog gets kicked.

Joe Palooka and the gang travel to Paris for a boxing match against the French champion. When Anne is assaulted by a masher, Joe searches the streets for the hooligan, distracting him from his preparation for his powerful opponent.

Before the big fight, Joe and his opponent come to blows at their hotel. Palooka knocks him out and the fight has to be postponed.

The Palooka gang is out of money again, and Knobby and Johnny try to raise some quick cash by selling phony watches. Their first sale is their last, when a burly customer realizes he's been had. Next stop, Joe, Knobby and Punchy load up at a local diner, and Knobby has a scheme to skip out on the bill. Of course, the diner owner turns out to be their watch customer, and the boys make a hasty exit with the manager's waitress girlfriend in tow. Knobby books Palooka into a local vaudeville house to put on some exhibition bouts. Of course, their friend from the diner is in the audience, with a bag of rotten tomatoes, and he's more than willing to come on stage when Knobby asks for a volunteer to box with Joe.

Heavyweight champion Joe Palooka (Robert Norton) and his manager/trainer Knobby Walsh (Shemp Howard), are eating a poor farmer out of house and holdings while Joe prepares for a championship bout at Madison Square Garden. The farmer sends the local sheriff to collect from Knobby.

Joe Palooka and Strangler Chokeovitch have set up training camps on adjacent beachfront sites. When Joe knocks out the Strangler after a misunderstanding, Chokeovitch's manager challenges the champ to a professional wrestling bout, with the winner taking all the gate receipts.

Now that they're engaged, Ann wants Joe to retire from the ring, seeing as how he's the heavyweight champ. Ann's mother, who doesn't want her daughter marrying "beneath" the wealthy family's standing, to set Ann up with a European count. What the mother doesn't know is that the "count" is after the family's money more than he is Ann.