"Sister Monica Joan goes missing at Christmas time leaving the nuns and nurses distraught. Trixie, having battled through her issues with alcohol, finds a new purpose in her keep fit classes. And could friendship blossom into something more for vicar Tom Hereward and Barbara? Meanwhile, a string of babies born with severe and devastating deformities, casts a dark shadow over the entire team at Nonnatus House as they struggle to understand why."--Container....