Ulla Sallert

He looks like an ordinary boy, but is small like a thumb and lives under the boy Bertil's bed. There's also Nisses landlord, a nasty rat (Tjoffsen). Through putting a finger on a spike and saying Killevippen! can Bertil become small as his friend and play with him under the floorboards.

It's the early 20s, just after World War I. In Sweden, restrictions on alcohol are harder than most people like and so, smuggling is abundant. In this particular little town, smuggling is ruled by one man, who is the king of smugglers. The smugglers who work for him don't get to keep much of the profit themselves, but if they don't work for him, they get in trouble, which his henchmen make sure. However, Albert Jansson arrives in town and starts taking up the competition with the smuggler king.