Tilly works for a letting agent, and when her divorce leaves her broke, she starts living temporarily in one of her agency's empty holiday rentals with dog Smoosh. 

Unfortunately, the owner dies and the new owner George comes to check out the property. A cat and mouse game of hide and seek starts until George falls off a ladder and Tilly drives him to hospital and starts looking after him. 

Forced proximity is a popular trope and it works well here. I liked the main characters, the story is well-rounded and Christmassy and the romance is believable if predictable. You could do a lot worse with this novella.