Une nouvelle aventure attend la bande d'Olsen. Au programme : un investissement dans le pétrole, l'énigme du Sphinx, le fantôme du pharaon et l'enlèvement de Valborg.
Henrik Johnsson is 19 and has a much too interesting life to have months again to live. He has brain cancer, so what shall he do with the little rest of his life?
Twenty-year-old Thomas Lindgren gets out of a youth rehab clinic, after being falsely accused of raping his ex-girlfriend's younger sister. He is looking forward to a new life and the summer in Oslo with his friends - But soon, he finds himself beaten, tied up and held hostage by the victims father who is desperate to find the truth.