Two "brothers" (Gabriel and Elias) are informed after their father's death that they both are adopted half-brothers. They discover that their biological father is Evelio Thanatos, a geneticist specialised in stem cell research. To learn about their mother and to meet their biological father, the brothers choose to visit the Island of Ork where they find out that they have three other half-brothers (Franz, Josef and Gregor). Both Gabriel and Elias are welcomed with a beating, but in due course, the brothers get along. All five half-brothers have hare-lips and unattractive facial features or deformities.