In an older condo in Copenhagen, some craftsmen make a scary discovery: behind a faux wall they locate 3 mummified bodies sitting around a dining desk with a unfastened space geared up. Carl Mørck and Assad from Department Q now ought to discover who the mummies are and for whom the fourth region is meant. They soon discover that the preceding population of the rental hint again to an infamous ladies's health facility at Sprogø island, where attempts at forced sterilization were a ordinary part of the day by day lives of the women who have been added to the sanatorium. The horror on the sanatorium is an overdue bankruptcy within the history of Denmark, however there are folks that say that the experiments are nevertheless up in our time. Carl and Assad start a race with time to prevent new murders and assaults.