A retired sheriff detective, Mark McKinney and his wife, Sherry, a retired emergency room physician, seek out an answer behind the spontaneous human combustion deaths of an elderly couple in their retirement community. The two sleuths find Edna and Carl Parkers in their bed as a silhouette of ashes. The two sleuths recruit Ron Baker, a computer forensic specialist for the Marion County Sheriff's Office Forensic Crime Scene Evidence Division. His computer wizardry assists in investigating the SHC deaths from his state-of-the-art home computers and forensic lab. The determined trio are taken into dangerous, unpredictable scenarios trying to solve this medical phenomenon. Unsuspecting evilness tries to prevent our sleuths from completing their investigation. Can the medical sleuths solve the mystery before ashes of death takes them?