This is a new era of heroes, the era of the Justilce League. But as a new kind of hero appears, also a new kind of threat.

As Diamond Tiara does her best to balance her hero-self with her normal self, a new, powerful foe appear, and he's obssesed with 'playing' with Batmare.

In the meantime, Cheerilee struggles with a problematic student, and all her attempts to help her being blocked; and Princess Luna does her best to protect the sanity of her chosen knight.