Mia takes Oskar and Tilly to a unique world in her book where they explore and meet Rainbow Guy, Beetroot Girl, the Leafthings and Nice Cream Bear.

When Mia, Oskar and Tilly cannot find any place to play they decide to build their very own playhouse with Ice Cream Bear, the Leafthings and Rainbow Guy.

Mia, Oskar and Tilly explore using superpowers to help Beetroot Girl save Watermelon Cat who is stuck up a tree.

After meeting Octobubbly, Tilly, Mia and Oskar become frustrated with his fits of bubble-blowing laughter.

Mia and Tilly persuade Oskar to go with them to a fairground where they meet Nice Cream Bear and try out the rollercoaster.

After Tilly mysteriously disappears while on a treasure hunt, Nice Cream Bear Mia and Oskar find her, the treasure and Mrs. Drago deep in the forest.