A wandering pedlar turns up in Leif's village, much to the delight of the Vikings of Frondfell. Only Leif suspects there's something not quite right about the small, wrinkly old man. As belongings start to go missing in the village and the pedlar is suddenly nowhere to be found, his suspicions are confirmed. Can he track down the disappearing pedlar, survive insane flying inventions, and prove himself to be a hero once and for all?

Leif wants to be a hero, but as the youngest and smallest member of his huge Viking family, he's never had the chance to shine. Can he finally become a champion at the Midsummer Games? All he has to do is compete with some fully grown Viking heroes at sports including archery (no problem, with his very special bow from Queue the Artificer) and wrestling (big problem, the other contenders are all twice his size). Oh, and keep the Widow Brownhilde away from his father before he does something stupid like marrying her. And stop his meddlesome granny from cheating. And avoid his gigantic...