As snow and ice blanket Weidman, there’s no slowing down for Dr. Pol and his team, who battle the elements and slick roads to save their clients animals. As the clinic becomes increasingly busier, Charles swaps sunny L.A. for frigid Michigan to help with the workload. Dr. Pol 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. Always up for a challenge, Charles agrees to take the bitter cold dip, making him feel as sick as some of the clinics fuzzy four-legged patients. But his preparations must be put on hold as the emergency calls continue. Dr. Brenda must head out on the icy roads to save the life of a beloved pet cow. Dr. Pol skids and slides his way to repair the leg of a prized potential racehorse the owners fear will never get the chance to run again. As the week continues, Charles begins to have a change of heart. Will his nerves get the best of him or will he take the plunge?