A group of ponies (after the other groups went to other places away from Equestria) were walking into a forest of green plants, Greek creatures and filth, which as of today was called the "Everfree Forest", and there they found a mysteriously working, rusty machine near a camp, which they bought back to their place to study its functions. They then found a way to use it to travel to different dimensions, which in there they will face challenges over time.