 As repayment to a priest who got him out of a scrape with the law, Slip agrees to drive the cab of a cabbie who has been injured in a collision. The job turns out to be more trouble than it s worth, as Slip s girlfriend is mad at him for working so much he hardly sees her, and Slip finds out that a rival cab company is involved in a scheme to wreck all of their competitors  cabs so they can have the whole city to themselves.