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!

The preparations for Liz Merrick's and Ben Norton's wedding are in full swing and her replacement as the local GP, Dr. Helen Trent, arrives and immediately has clash with Jenny. Speaking of Jenny Sergeant Merton is very worried about her and talks to Dr. Merrick about her, but the beautiful doctor assures him that there is nothing wrong with Jenny. For once Dr. Merrick is wrong and Jenny leaves the surgery unattended and unlocked. When Dr. Merrick returns she finds the surgery in a mess and some dangerous pills missing. When Jenny is confronted with she gets angry again. Her husband tries to help her, but only manages to convince her sick mind that everybody is against her. And he almost gets arrested for assaulting her when she runs away.