Francesca Pena is an unlikely success story. Running from a troubled past, she's come to New York to reinvent herself, earning a scholarship to NYU. Following a night of heavy drinking with three of her closest friends, she's reported missing. . A week later, Francesca's body is discovered severely mangled in a toilet by the East River. When the high-profile case is taken over by the Homicide Unit, Darlene O'Hara from New York's 7th Precinct and her partner Serge Karamanoukian ('K') continue their own investigation in the city's seedy underbelly, where strip clubs, lecherous pimps and prostitution reign supreme. Just when the Homicide Unit thinks they have the real killer in their sights, O'Hara and K reveal their own findings-with not a minute to spare.