A fast-paced and engaging narrative about a medical assistant who despairs of finding the funds for his final year of medical school until, while defending himself against the belligerent spouse of a patient, he ends up knocking out the town's best candidate to defeat the local boxing champion, the Croxley Master. Learning that the impending fight carries a prize money which would see him through his education, he agrees to step in as the new challenger and see whether he can defeat the Croxley Master.