Christmas is near and Kate Rowan has arranged that Danny Parkin, who is very ill, gets home from hospital during the holidays. A trip to a sanatorium in Switzerland will do wonders for him and to earn money for the trip his siblings "borrows" Christmas trees from Lady Whitly's estate in order to sell them. The snobby, but very attractive Lady Whitly shows a lot of affection for PC Rowan, who is sent to investigate, and she is also involved in the local Christmas charity concert. The same concert needs a Santa Claus and a reluctant Greengrass is hired for the job. Not surprisingly he tries to make money on the deal. And speaking of Greengrass, somebody has nicked his lorry!