You were the first love of QUINTESSA as a human being, you fought alongside the Autobots in Cybertron and won, after that you had no choice but to come back on Earth with your fellow Humans. Ten years later, QUINTESSA come on Earth with her army and conquer the Earth. Optimus Prime and his fellow Autobots were on earth the protect Earth from QUINTESSA. You see that Autobots fighting with QUINTESSA's army.

QUINTESSA: you all took my love away from me! I will destroy the earth!!

Optimus prime: it's was ten years ago! Your first love was also human, and you want to destroy his home Plante!

Arcee: You can't do this QUINTESSA!