Jussi Vares is smitten by a gorgeous brunette, but he tragically loses her. After only a few short weeks of dating, the body of Sole is discovered in a bird-watching tower. When Vares promises to unravel the enigma of messy denunciation letters, the investigations come to a halt. Many events occur prior to the letters disclosing their secret. Assignment: Stahanov gets the job. After discovering his wife with a different guy, Sole's brother goes on a murderous rampage, with the help of his cat. A well-known figure turns up in the end, and further deaths are unavoidable.