A young and talented detective, William, gets an excellent student from the forensic science department, Audrey Nimfa, as his partner. He is on the verge of losing his job, she is on the verge of losing her life... Despite the abundance of darkness and secrets in life, they are united by faith in justice and a bright future. After a friendly trip with colleagues to the Museum of Osteology, they discover the skeleton of a missing girl hidden in plain sight. It soon turns out that this is the work of the serial killer Puppeteer. Will the heroes be able to find the remaining victims and reveal the identity of the Puppeteer, or will this case be the last in their careers and lives?