When senior members of the Nonnatus House staff head to Hong Kong on a mercy mission, the younger midwives are left to cope alone. As the Christmas action shifts between the sun-drenched Far East and a snowy East End, Sister Julienne suddenly finds herself excited about the Order's future. After years of battling change, she decides to embrace it, work with it, and see what love can do.

Call the Midwife, based on the best-selling memoirs of the late Jennifer Worth, tells colorful stories of midwifery and families in London’s East End. Inspired by the memoirs of Jennifer Worth, this very popular, multi-season series follows the nurses, midwives and nuns from Nonnatus House, who visit the expectant mothers of Poplar, providing the poorest women with the best possible care.