Jan Hansen receives a letter from overseas in which his Australian uncle Paul affirmed some days before his death that he is the biological father of Jan.But Jan has grown in the house of Ferdinand Hansen , Paul's brother,who has always said that he says the father of Jan.Then Jan travels to Australia where he is the heir of a beautiful island,but with a lot debts.Now Jan doubts about selling the island because he has fallen in love with the biologist Anne van Gaard who manages a little animal research center on the island.