Trixie is always walking to school, she is always walking home from school. When a construction site blocks off the road she always goes down, she takes a detour and finds herself on the wrong side of town.
Tired of being accused and insulted by the goers of Canterlot High, Sunset decides to clear out her locker and leave the school for good. Unfortunately for her, a couple of students weren't going to let her leave that easily.
Starlight's old collectables are delivered to Twilight's castle, among them is a dusty Starswirl The Bearded scroll. One that transports her into a different dimension.