After Poplar has a mysterious outbreak of dysentery, first-time mother Marie Amos's life ends up being turned upside down after her husband Tony is arrested for gross indecency with another man. Patsy attempts to help the young couple, as Tony faces a criminal hearing. Nurse Crane attempts to help a pregnant Irish woman with two young children are covered in flea bites and clearly malnourished.
Barbara has to deal with her most challenging case yet after she helps a first-time mother as the birth does not to go according to plan. A new nurse shows up and soon makes an impression on Sister Evangelina.