While in Stockholm, Sweden during the Herring Festival, the Secret Millionaires Club drums up business for a small herring eatery called Dahlquist's which is run by Isak Dahlquist's family. The Secret Millionaires Club discover that Dahlquist's faces stiff competition from a fast-food restaurant called the Happy Herring which is owned by Arnie Sr. Meanwhile, Jones and Radley learns about Bandy from Isak as they learn how do Bandy against Arnie Jr.'s team.