A young woman, one of two twin sisters, was killed. The police quickly get on the trail of the criminal, but they will no longer be able to obtain any explanation for the bloody murder - the criminal committed suicide. The case is closed.

But the sister of the murdered woman is sure that Gillian was not dealt with by a lone maniac, and she begins her own investigation. Step by step, moving forward, the young woman puts together from fragments a whole picture of a grandiose and terrifying plan...