A lot has happened since we last saw our favorite herd. One of the biggest surprises is that there is going to be a new member soon. All of the excitement along with the new arrival has everyone on edge. Adding to the chaos, Sid finds himself in a situation where he needs more help than ever before. As his friends venture into the underworld to find him, they'll soon realize that the world is much larger than they could have imagined. They begin to explore this new world whilst searching for Sid and find themselves in a bit of trouble as well. A new friend will help them in their journey. While they are searching for Sid, Sid is having his own adventures as well. He has a new role now, besides just a simple member of the herd. How will all of this fit in? Will Sid stay in the underworld? Will his friends find him? Will any of them get home safely? One more surprise is bound to get your attention by the end as well... So hang on to find out what it is. This continuation of the journey this herd has endured adds a bit more to the characters than we have seen before. Let's hope they continue on the same path they are on and wait to see what's next.