In this episode we meet two new characters Dixie and a unknown shadow Bonnie. The shadow bonnie is the person with takes control of all universe of animatronics. While his assistant Dixie is his side kick to him, now the whole plot is easy to explain and kinda understand for others.
So basically Helpy, Half broken Chica, and Golden freddy all came from universes where they came from but they all wanted to be free out of them to have their own life of themselves. So they all met up and there's the three of them. But the problem is that if anyone leaves their universe it can cause problems to the one they left which can lead to bad consciences. Which is why Bonnie needs them all back.