A Swedish ship is wrecked. Little Lobke is the only one to survive this disaster. She is taken into the family of Sil and Jaakje Droeviger, who have two sons - Jelle and Wietse -. Because it is not certain whether Lobke still has parents and religion is also a problem, so Lobke's baptism still takes place after much arguing with the pastor.

Jelle has emerged as a womanizer and has a girlfriend, Maam. Maam is also close friends with Lobke. Wietse has trouble with the somewhat unfair hustling on the island. There are rules for this on Terschelling, but father Sil has his own thoughts about that.

Jelle and Maam are increasingly together. Lobke has the most grip on Sil; she can still go to catechism. When Jelle has sprained his ankle and cannot join in, Sil calls on Wietse. However, he wants to hand over everything to the beach warden as it should be. Sil becomes enraged and knocks his son to the ground. The next day, Wietse appears to have left. He's been to sea what he wanted. times are tough for the family.

During the Sunderum party it appears that Lobke has been dancing with Jelle all evening. He cares about her much more than as a brother. This to the great sorrow of Maam. She thought she was dancing with Jelle but turned out to have Aike in her arms. Sil looks at his son's attention to Lobke with great eye. that is not possible because he is his sister period. Quarrel is the result.

Aike invites Lobke to the party. Jelle is open about his feelings for Lobke. Sil cannot bear this and Jelle goes through the shed. In the meantime, Maam is saddened to drink and have fun. Mother Jaakje is as always in the background and is resting where she can.