A near tragic car accident between mechanic Thomas Watkins in his auto and nanny Sara Moffat results in the one-time couple reuniting.
When Thomas is tasked with selling the Bellamy's Silver Ghost, he finds himself involved in a high risk smuggling scheme involving stolen jewelry.
Circumstances put Thomas and Sarah at a costume party for the gliteratti dressed as servants and it's assumed that the two are aristocrats.
After Madge's friend, an ex-policeman, locates Sarah performing in a music hall, she and Thomas decide to sell the garage and collaborate on a magic act.
While caretaking the townhouse of vacationing aristocrats, Thomas and Sarah take the opportunity to use the premises as a matrimonial agency.
Sara is working at a private boys' school when Thomas arrives and brazens himself into becoming a teacher.
Thomas' mechanical skills earn him a holiday as the seashore Metropole Hotel, where Sarah meets an old chorus girl friend now married to a rich sportsman.
While trying to win a photography contest run by a local tabloid, Thomas comes down with pneumonia, and the prognosis is grim.
With the profits from a jewelry swindle, Thomas and Sarah open a successful haberdashery as Sarah announces she is pregnant.
Thomas becomes suddenly homesick for his native Wales and with Sarah travels back to his village home for the first time in ten years with dire consequences.
Hoping to pull profitable con, Thomas and Sarah impersonate an inventor and a French countess but get taken in by another pair of con artists.
Nouveau riche Sarah and Thomas have the use of the Andover townhouse, but their egalitarian attitude towards their servants is frowned upon by their butler Wilson.
Thomas and Sarah go into the service of a depressed and dissipated aristocrat with a death wish, but their good cheer lifts him out of his doldrums.
