Things look very different at Skeldale House as James grapples with Siegfried's wild and chaotic energy. Tristan returns from war, and he and James take matters into their own hands. Amid the upheaval, there may be good news just around the corner.

Tension sparks when James buys an X-ray machine for practice, challenging Siegfried's traditional methods. Mrs. Hall learns more about Siegfried's shenanigans, and Mrs. Pumphrey seeks advice from the team when Tricki seems unusually distant.

Tristan and Siegfried find themselves in competition to treat the horse of a wealthy family that's new to the area. Mrs. Pumphrey and James prepare Tricki for a special visitor, and Mrs. Hall uncovers a surprising secret of Tristan's.