(Please note this happens a little bit before forgotten friendship.)

Some how some way the sirens have regained their magic. And there after sunset shimmer and her friends. But to be surprised they only find sunset and Sci twi. With the magic the sirens have. Thay can be able to use their magic against sunset and Sci twi. Now both sunset and Sci twi have no other choice but to stop the sirens before they take over the human world. And take over their friends with their magic.

(Please note: this is for a story I'll be uploading to My DA page this weekend.)