Siblings Lasse, Jonna and Oskar Waldemar are reunited after many years at the family guesthouse on the Åland archipelago. The reunion is filled with conflict and brings up old memories and secrets. Meanwhile, their mother Anna-Lisa has a hidden agenda that will change the siblings’ lives forever.

It’s midsummer and the guest house is preparing for the wedding, which creates unexpected difficulties for Oskar. Jonna gets a surprise visit that complicates things further. Lasse and Liv have a conflict related to the past, but when the truth comes out, everything changes and they cross a line.

Oskar is terrified. Who is behind the blackmail? He suspects Lasse and the siblings drift increasingly apart. Jonna gets an ultimatum and is forced to choose between her old and new life. Lasse and Liv relive old memories. Meanwhile some youngsters are sailing out to sea when a dense fog draws in.