To allow Sister Julienne to recuperate, Shelagh takes over the running of Nonnatus House, which involves overseeing plans for Sister Evangelina’s surprise Jubilee celebrations. When a lemon meringue pie goes missing, Sister Monica Joan is the prime suspect but it’s Sister Evangelina herself who seems secretly troubled. PC Noakes then spots her concealing a parcel of food, which she reveals is for a mysterious figure from her past…

Meanwhile, the midwives deal with a difficult case when they’re involved in a charity drive to send donations to St Gideon’s, an institution that cares for those with disabilities and learning difficulties. After the institution’s annual dance, Sally, a girl who has Down’s syndrome, is feeing unwell, so her mother takes her to Nonnatus House, where it’s discovered she’s six months pregnant. How will Sally cope?

And there’s a new arrival in the shape of new nurse, Patsy, whose no-nonsense attitude and sense of humour makes her an instant hit!