Four kaiju, code named Godzilla, Mothra, Ghidorah, and Rodan. All four awaken with the intent to battle each other, with millions of lives on the line. All of Equestria must pull together before the kaiju converge in Canterlot.

When an odd question pops into Smolder's head during lunch, it begins to spiral out of control, leading to some very unfortunate events involving Gallus.

When Smolder finds a secret room in the Castle of the Two Sisters, she comes into contact with a mirror holding secrets to another race that lives in secret among certain creatures. Some are out to harm, others to protect. Now in the radar of more villains than she's had to deal with in here life, how will this new discovery effect Smolder's relationship with her friends?