Sharon Brooks is a former FBI analyst who is making a lot of transitions in her life. She's separated from her family, started a business, and changed her gender. Sharon was once Michael, one of the best forensic accountants the bureau had ever seen. When the higher ups gave Michael no choice but to leave law enforcement, he went one step further, leaving the male world behind forever. Michael became Sharon and picked up where she had left off, starting a private investigation agency. When a former FBI colleague sends word that he needs Sharon's help, she's more than willing to tell him where to go. But when she finds out that an ex-informant is in the crossfire, she's ready to throw down. Accompanied by a team of hired killers, Sharon is on a mission of mercy to the darkest depths of a secret underground government facility. The subterranean complex holds a lot of answers, but they're guarded by a swarm of monsters, former humans with only one thing on their mind: Devour or die.