When Ainhoa and Jorund drift off under the stars at their town museum's special sleepover, they never imagine an interactive floor map will whisk them away on a whirlwind tour of world wonders. From the Taj Mahal's marble inlays to the Great Barrier Reef's vibrant corals, each landmark reveals its own story—and gifts them a glowing "memory shard." Along the way, they learn architecture, conservation, culture, and more through taste, touch, and wonder. Returned home just before dawn, they present their shards in a dazzling exhibit, inspiring classmates to see every corner of the globe as a treasure worth protecting.