The village priest Sein has no intention of becoming an adventurer, but his desire to find a long-lost friend may lead him to join Frieren's party on their journey north. They are headed for the magical city of Äußerst, where Frieren can obtain the first-class mage certification needed to enter the Northern Plateau region. At Frieren's urging, Fern decides to take the certification exam as well, and faces some unexpected competition...