The old farmer and his wife firmly believe that their cat is their son.
So they ask the vicar to educate him.
At first, the Vicar is amused but then he sees that he can make money from the old fools. He makes them pay for their 'son's' bed and board, and then for his books and the paper he writes on, for new clothes...
The old couple work themselves to the bone to pay for their Thomas' education -- never realising that the cruel vicar strangled their kitten on the first evening they left him at 'school.'
When the time comes for Thomas Katt to leave school, the Vicar tells the old couple that the naughty kitten ran away because he didn't want to learn.
The old couple are very sad.
The Vicar gets a better job. He's made chaplain of the Queen's own chapel in London. He decides to play one last joke on the old pair.
He sends them a notice from the Miching Mouse Tavern. A Master Thomas Katt, merchant, is to be staying there, having just returned from a voyage with furs to sell.
The old couple sell everything they have and travel to London, in hope of finding their beloved lost kitten.
Of course, there is no Miching Mouse Tavern and there is no Master Thomas Katt.
The Vicar made them up.
But when the old couple reach London, things take a very strange turn.