Fifteen years after they last saw each other, Benny, Valborg and Dynamitt-Harry discovers that Egon Olsen is out of prison and living in a retirement home. Olsenbanden is reunited, and Egon has a plan.
The Olsen Gang realizes that cash is obsolete with the current inflation rate, and plans a coup for property and bonds. They make a fake company and tries to buy Oslo's biggest shopping mall, Steen and Strøm.
The Olsen Gang is involved in a weapon trade for half a billion. It's their final coup, and Valborg is finally allowed to participate.
The Olsen Gang has traveled south after the success of their last coup, but there's still someone who hasn't given up catching them.
The Olsen Gang is robbed in Spain and loses the millions they earned from their last heist. Egon has a plan to get the money back by robbing the National State Railways for a gold transport.
