A pair of desperate parents. A man on the run. A rookie cop. Four people with everything on the line. What will be left in the ashes of the next 24 hours? Following their daughter's mysterious disappearance, Ryan and Elsie Delaney have taken the LAPD forensic lab hostage, and have given law enforcement an ultimatum: Find their daughter, Tilly, or they will destroy all the evidence they can find to other cold cases.