The keeper’s rats are kept in a comfortable cage until they’ve served their purpose. The keeper feels they’re as individual as humans; they like to eat, play, fight and procreate. And some like to kill…. Life is good in the Becket household. Sam is planning a surprise for Grace’s birthday, Cathy's back from California and Grace is seeing patients again. Even Sam’s partner, Martinez, is in love. And then the killings begin.
A newly-wed couple is found horribly slain in Miami Beach, their nude bodies bizarrely displayed. As Detective Sam Becket’s investigation gets into stride, a second couple is abducted. Soon, couples all over Miami-Dade fear for their lives, and Sam and the squad are battling an unseen enemy, against whom no one is safe. No one….