Homicide investigator Evert Bäckström is convinced that a crime has been committed when a woman's skull is found on an island in the archipelago. But his investigation is opposed by the chief of police; and when the woman's identity is clarified, the whole investigation is turned upside down.

Jaidee seems to have died twice, both on Ofärdsön and in the tsunami disaster. Bäckström wants to interrogate the widower Daniel, but when Hwass gets in the way and his colleagues distrust him, Bäckström proceeds with the investigation on his own.

Bäckström goes to Thailand to dig for the truth about Jaidee's life and death. At the same time, the investigation group in Stockholm follows a completely different track. They are convinced that Jaidee died in the tsunami and soon the Asian Mi Mi's husband is arrested.

Bäckström is convinced that Jaidee faked her own death in connection with the tsunami, but the group is skeptical and Bäckström lacks evidence for his theory.

Bäckström is suspended, but still continues his private investigation with the help of Edvin. Together they go to the scout camp to confront Edvin's scout leader Haqvin, who turns out to have connections to both Jaidee and the site where the skull was found.