A two-year-old Labrador's life is on the line. Willow has been rushed to the hospital as an emergency because a severe infection has taken hold in her chest, leaving her struggling to breathe. Graeme is invited into surgery as the soft tissue team operate on Willow to relieve the pressure on her lungs and heart before trying to find the cause of the infection. For 24 critical hours, distraught owners Charlie and Amanda desperately hope their beloved companion pulls through.