The movie is set in Oslo in 1960. When the new TV channel NRK opens they have a talent competition where the winner gets 50,000 kroner. And Olsenbanden Junior just has to get in on this, and they come up with the band "The Dynamites", but they face stiff competition from Biffen's band "The Biffers" …

鬼主意层出不穷的小男孩艾根从小生长在孤儿院里，他和小伙伴芬尼和希尔是孤儿院里最调皮捣蛋的一群。不过，在顽皮的背后却隐藏着一颗孤独的心，艾根十分渴望有一个家。这天，孤儿院来了一对叫做乌苏拉的夫妇，他们号称是百万富翁，想收养一个小男孩作为自己的儿子。艾根听说之后高兴不已，并精心地设计了一个计划，成功地使自己成为了这对夫妇的…