Pol's son Charles returns home from sunny L.A. to help his dad with the workload, but the good doctor has a treat for him. He challenges Charles to take part in the local Special Olympics charity event, the Polar Plunge, where participants dive into an icy lake in the height of winter. As Charles attempts to squirm out of his commitment, Dr. Pol races to a farm call to check on a horse that's showing irregular symptoms. The owner anxiously awaits test results, as she is worried she may lose her favorite horse. Meanwhile, Dr. Brenda discovers a cow is having respiratory issues and has twisted its stomach, which must be fixed immediately. Finally, Dr. Pol must race out on an emergency farm call to help a young racehorse who has severely wounded his leg, jeopardizing his racing career and possibly his life. Dr. Pol quickly moves into action to numb the leg so he can carefully sew the wound. Only time will tell if the horse will ever be able to run again.
Source: National Geographic Wild