Timm is incredibly excited that he gets to travel to Sundevit. But first, he has so much to take care of! Timm, the son of the lighthouse keeper, is often alone. So he is very happy when the boys and girls who have been camping on the beach invite him to join their trip to Sundevit. However, Timm still needs to deliver glasses to Heinrich Bradenkuhl, who also has an urgent task. Timm can't possibly say no. But time is running out. Hopefully, the boys and girls won't leave for Sundevit without Timm.