Christmas has come to Gadgetville. This year, the villagers gather with Lotte's family to sing, dance, and give presents, as they do every year. This time, a surprising fir tree will also be attending the Christmas party.

One of the coolest things in the world is when you get visitors! And it's even more fun when those guests are your grandmother and grandfather who live quite far from Gadgetville.

Lotte can do detective work again. The adventures begin this evening as Jaak flies across the village and checks that all the villagers go to bed at the right time.

Lottemaa's relic, the ladybird Uku's cane, the founder of the Gadgetville, has long since disappeared. Could it be that Lotte and her friends finally find it?

Lotte is actually used to seeing something interesting happen every day. And not one or two, but sometimes even ten exciting things a day. But some of them are so unexpected that they wouldn't believe in themselves afterwards if they hadn't seen it all with their own eyes. Today, the pancakes pile up on both Klaus's plate and on the schoolyard windowsill will go missing.

Lotte and her friends Bruno and Albert decide to give their mothers a very nice surprise. But as it turns out, it will not come as the only surprise…