While the Cookies of Earthbread were fighting to protect their home against Dark Enchantress Cookie and her forces, some kind of strange portal opened up in the middle of battle. Before Shadow Milk Cookie, the Beast of Deceit, could finish the Ancient Cookies off with his magic, the portal started to pull things into itself, dragging his feet from under him and eventually pulling Shadow Milk Cookie up into the air and sucking him into the portal...

The last thing Shadow Milk Cookie saw before being sucked in was Pure Vanilla Cookie looking back at the scene in horror...

Meanwhile, in another reality…

It was a nice day today, the birds are singing, the flowers are blooming… But uncertainty never leaves the air. The city of Musutafu, Japan has been quite peaceful recently. Most of the villains are in hiding or behind bars, and the heroes are all at ease for once...

But nothing good can last forever…

In the middle of the peaceful day, without warning, a portal ripped open high above the city skyline. A figure — no, a person — shot out at high speed, crashing into a nearby building with a deafening boom. That building is none other than UA High. Brick and glass exploded outward, and a huge crater formed in the wall where they landed... Shadow Milk Cookie.

Dazed and half-buried under rubble, the poor Beast Cookie barely registered the world around him as the sounds of panicked shouts and pounding footsteps filled the air...