This is the charming sequel to the acclaimed family film "Summer with Selik," the enchanting story of the relationship between a teenage Norwegian girl named Katrine, and a newborn harbor seal, filmed by the great Norwegian nature and wildlife filmmaker Trygve Berge along the visually spectacular western coast of Norway. "Selik and Katrine" takes place the following summer, when Katrine's interest in seals and wildlife leads to an offer of a summer job at the local seaquarium.

While collecting marine samples with Simon and Mats, young boys from the neighborhood, she sees Selik close inshore and realizes that he is living among the inner skerries close to her island home. Soon after, she hears that Selik has been raiding the fishermen's lobster pots and she fears he could be shot by hunters. It is the hunting season and Selik, now a fully grown adult seal, should be living far out to sea. Curious as ever, Selik revisits the house and garden at Teistklubben, as if recalling the first three months of his life there. For a while, Katrin and the two boys are amused by the seal's antics, but Katrine is aware that the situation cannot continue. She resolves to return Selik to the outer skerries eight miles offshore. To do that, she must first study the big seal colonies there, and determine whether the other seals will accept Selik.