Life hasn't been easy for Isabella. She spent most of her childhood in the foster care system, and now at twenty-two she has landed herself in prison on drug charges. Her troubled past is what makes her a perfect candidate for the government's latest scientific endeavor, Operation Gene Re-sequencing. No one will miss her. No one will question her absence. But, when it's discovered Isabella is immune to their DNA-changing drugs, she is selected to be used as prey for those who aren't.

Chase and Brayden couldn't be more opposite; Chase is calm, reserved, and completely insistent that he will control the changes the virus is causing in his body. Brayden, on the other hand, has always been wild and uninhibited. He welcomes the new animalistic nature coming over him. The one thing they have in common? They both have a taste for the cute little Asian inmate who is now sharing their cell.