After a mild stroke leaving his right side paralyzed, the doctor telling him a total change of lifestyle is required to escape a massive heart attack. Being Sweden's most successful detective, the doctor tells him her father, a priest, now deceased, had a woman for confession. She told the priest she knew the man who raped and killed a nine year old girl in 1985. The doctor ask the retired detective to investigate. The case being unsolved and also too old to be prosecuted, the partially handicapped detective, enlists a former colleague to help. In between trying to escape his new dietary regime, with a stubborn attitude and known to be the man who can see around corners, he follows the old trail left by a paedophile killer in the Swedish summer. Not knowing what to do if he actually finds him. Let the old testament rule apply? An eye for an eye?