Following the events of the Star vs finale "Cleaved," Star and Marco adjust to their new world and begin contemplating the next step of their relationship and their lives. But not everything is smooth sailing. Something went wrong when Mewni & Earth merged, and everything comes to a head with the return of familiar faces, the return of a dangerous foe, and the unearthing of shocking revelations that could change everything for everyone...

READ WHEN TWO WORLDS COLLIDE BEFORE READING THIS STORY! Many changes have come to Earthni since Astroida and her malicious attack. Now, there's a lot of rebuilding to do, along with many secrets and mysteries about Mewni's royal past needing to be uncovered. Could there be some discoveries that Star and Marco never would've guessed about?....and may there be consequences for finding them out?