A dad makes a frantic 999 call when his 20-day-old baby stops breathing, and she's raced by ambulance to Wrexham Maelor hospital where an emergency team are waiting to save her life. It's peak viral season and on the ward the parents of a two-year-old on her eighth emergency admission desperately seek answers, while a toddler is tested for suspected pneumonia.

Heartwarming stories from one of the busiest children's wards in Wales - Wrexham Maelor. For the first time ever, the hospital has granted 24-hour access to the team that look after critically ill children. This episode features a fight to save a little girl's life.

It's peak viral season, and Wrexham Maelor enters its busiest time of the year. Casualty is closed, the children's ward is full and three nurses have just phoned in sick. An unprecedented insight into how the biggest hospital in north Wales copes when it is hit with the perfect storm.

The emergency unit is full with some of the 5,000 children they see each year. Among their ailments ranges everything from broken bones and bumps to items up noses. On the ward, a three-year-old child has an infection that could risk her eyesight, and hard decisions await on how to treat a girl with suspected appendicitis.