In this story there is once again a serial killer in Miami. Deputy Chief Matthews, has asked for FBI help in the case. The BAU of the FBI are chosen for the case which is bad for Dexter Morgan because the BAU studies behavior. How will Dexter Morgan handle working with the BAU of the FBI and kill his murderer victims without getting caught? Read to find out. In this story the Bay Harbor Butcher case hasn't happened yet and will happen during the time Debra is the Lt.