In 2005 former midwife Jennifer Worth is at home preparing for Christmas with her husband Philip. She reminisces about the friends and colleagues of her youth at Nonnatus House, and one Christmas in particular. Rehearsals are underway for the Sunday School Christmas Concert, and while Chummy tries to choreograph dancing snowflakes, Trixie sets to work designing a Father Christmas outfit for Fred to wear. Chummy is enlisted to help run a poorly managed mother and baby home, and with Patsy's help succeeds in bringing some Christmas joy into the residents' lives. Cynthia is drawn deeply into a case concerning two former residents of a Victorian mental hospital who have been left to fend for themselves, and are barely coping. This causes Cynthia to make a life changing decision. There is but one question in all of their hearts, though it goes unspoken - what will 1960 bring?