Having lost his nugget, Staffan accuses everyone left, right, and center for the theft. Together with Åke and Maria, whom are cleared from suspicion, he plots to track down the real thief. On Saint Lucy's Day they walk from house to house, singing and offering homemade cakes. Whilst everyone keep the house owners busy with their song, one of them snoops around for clues. Åke finds something in the house of butcher Lagerström but runs in to trouble.
