Murder victims, war heroes, and loved ones can now return after death. The world is forever changed by LifeXtra, a drug known commonly as "LX" which allows the deceased to be resurrected for 72 hours of pain free existence. Teams are dispatched to investigate whether or not the drug is being used legally. Recipients must have died of terminal illnesses, by homicide or by war wounds. People who die of natural causes are not yet legalized as recipients of LX, though it does happen by sale on the black market.