The third and final feature based on the acclaimed Danish TV series finds Frank turning 50 so Casper invites him to Iceland on a boys' trip. Naturally, the trip does not go quite as planned.

Father and his family comes to visit onkel Anders' twin brother, Sofus, who comes all the way from Australia with a cow in tow. Unfortunately, Sofus equally surly and grumpy, as Anders is good and kind. Sofus takes his cow with Herefords to win milking competition. But when the cow refuses to give milk may Lille Per, Mie, Ole and Seas learn Sofus that words are leading the way to be good to others.

This sequel to the box office hit All for One finds the previously tight-knit trio dispersed: Nikolai is on parole, while brothers Ralf and Timo are planning a heist involving the unlikely combination of unsalted butter, a strict diet and a helicopter. When their seemingly impossible heist succeeds, Nikolai asks to borrow some money to start over. The brothers reject him, but when all three of them are tricked by a fish-loving banking executive, they are forced to team up again.