The cruise ship "MS Mythos" is on its way from Kiel to Norway - the unresolved past of the passengers in tow. On board are publisher Holk Sonntag, who believes he is responsible for his daughter's death, Guntram Fellner, a former soldier of the Wehrmacht with a dark secret, and retiree Jürgen Wörner, who is convinced he has recognized his Stasi tormentor among the passengers. Margo Sebald just wants to relax. But when the young Joan from the service crew suddenly disappears, she follows his trail. The situation on board intensifies...