Roscommon couple Orlaith and James arrive at the Rotunda for an emergency procedure on their twins, who are at 16 weeks gestation. They are hoping to save the lives of both babies, who have been diagnosed with twin to twin transfusion syndrome. Meanwhile, Katie and Seamus use humour to help them through labour, Valerie and Jeovani await the arrival of their baby, and Caroline is in the hospital with her mother Vivien as her birthing partner.