The vagrant is question is Joe Conway (John Carson) who someone has tried to deliberately run him over.
Just who is Joe Conway? Maybe a wino who is a known grass responsible for putting several people behind bars.
The police follow up Bert Flower and Gerald Tate two villains who had a motive to take revenge on Joe. Both deny it.
A newspaper clipping suggests something different. Joe is in line for an inheritance, if he can prove his real identity.
It started off as pretty routine but it got better as it went along. Of course by that time it was obvious who was trying to run Joe over. Bert and Gerald ending up as comic relief.
I did like the scenes between Joe and his former wife. I thought how could she not recognise him, only to later admit she knew who he was all along. Just what is in a name.
Once again Dixon goes hi tech running car number plates on a computer. Bill Treacher makes an appearance as a witness.