Five years ago, Jenny Lind was abducted on her way home from school.

Now her lifeless body is found hanging in a playground. But there is no evidence and only one witness - a man who cannot remember what he saw.

With Detective Joona Linna and the police scrambling to find a lead, another girl goes missing. And as they close in on the killer, they discover that the Mirror Man's crimes are more shocking than they ever could have imagined . . .