With the help of trusted family members, Autumn and Keaton set out to find the spell to reopen the portal and retrieve their children. But it isn't until their team faces their alternate-reality clones that they realize it's Opposite Day in this bizarre new realm, and locating Chloe and Jolyon requires the help of a back-country Alastair along with a Gothic, surly Spring.
Now, Autumn and Keaton must make nice with their other-world counterparts if they stand a snowball's chance of finding their lost children and returning home.