Although Dylan has returned to teaching, Lizzie calls upon his expertise with profiling sociopaths to assist with a bizarre case in which a venture capitalist was murdered and his body ritualistically displayed.

Dr. Dylan Reinhart and Det. Lizzie Needham are reassigned to a murder case in Central Park when their investigation into a chemical attack on the subway is taken over by an FBI team led by Dylan's estranged father, Roger. However, Dylan can't shake the feeling that the cases are related.