Moe, a struggling boxing manager, finds himself embroiled in a tumultuous lunchtime confrontation with his disgruntled fighters, who threaten to abandon him due to unpaid wages.

A serendipitous turn of events unfolds as strolling violinist Larry unwittingly triggers a violent outburst from the timid waiter, Curly, upon playing the melody of "Pop Goes the Weasel".

However, on the eve of the title match, Moe discovers Curly in the company of the lady, prompting a stern reprimand and a directive to focus solely on the impending bout.

The championship showdown ensues, with reigning titleholder Killer Kilduff asserting his dominance by swiftly dispatching Curly from the ring, causing devastation to Larry's violin in the process.

Ultimately, Larry commandeers a politician's campaign truck equipped with the desired tune, crashing into the arena to deliver the decisive musical aid.