Spearfish, a quiet town in South Dakota, has been rocked for three years, every fall, by a murder that surpasses any sick imagination. The same modus operandi. The same preferred typology of the killer. The same date: October thirty-first. The killer never leaves a trace. Captain Jacob White now has only 72 hours to catch the killer, otherwise he risks losing his position. The bosses in Pierre send him a behavioral analyst to help him solve the puzzle that always seems to be missing a piece. "My superiors gave me only seventy-two hours to find the killer. Who the hell can find a psychopath in such a short time? We've been struggling for three years to catch the bastard, and the people in Pierre had the impression that in just a few hours we would work miracles." The more the investigation progresses, the more suspects appear. Countless secrets will be revealed, secrets that will be revealed, but which of them committed the heinous crimes? They all have a solid alibi, which destroys any scenario that the captain has built. Many false leads will lead to the same question: who is the real killer? This is the question that you will encounter throughout the investigation. As Captain Jacob White says: Every story has two sides. Only one truth.