Wickie, the tender son of the hulking Viking chief Halvar, proves his courage as a brave Viking boy in the wolf's den. But the clever youngster becomes a true hero when the children of his village Flake are kidnapped by the terrible Sven after a raid. At first, he only sneaks into the rescue party as a stowaway, but he soon takes the lead. Wickie has devised a cunning plan and the strong men help him to realise it.