The midwives receive a rapturous and warm welcome home from their South African adventure but all is not well at Nonnatus House. In their absence, Sister Ursula has been running a very tight ship and it is quickly announced that she will remain in charge at Nonnatus House, above Sister Julienne.

The midwives are drawn into helping Trudy, a heavily pregnant mother whose husband has just been released from prison for extortion. Gradually, the problems below the surface of their marriage become clear. Trapped and with no clear way out, Trudy's suffering sends shock waves through Nonnatus House, most noticeably affecting Sister Mary Cynthia who is experiencing increased anxiety following her recent attack.

Elsewhere, Shelagh harbours a secret and struggles to tell Dr Turner, and Patsy receives some distressing news about her father in Hong Kong. Show less