Life in Solby is nice and peaceful until one day Mitcho and Sebastian find a message in a bottle by the harbour. The bottle is from the missing mayor of Solby with a message that he is on a mysterious island and has made a great discovery. Now they must embark on a perilous journey to help save the mayor and bring him home, and in the process they uncover something that will bring great pleasure to the city of Solby – a giant pear.

Set right before Christmas, Niko the reindeer must deal with his mom getting re-married and his being tasked with looking after his little stepbrother.