 Murder By Numbers is a psychological suspense-thriller that tells the story of a tenacious homicide detective, Cassie Mayweather ( Sandra Bullock  (qv)) and her new partner Sam Kennedy ( Ben Chaplin  (qv)) who become pitted against two malevolently brilliant young men ( Ryan Gosling (I)  (qv) and  Michael Pitt (II)  (qv)) in an ingenious battle of wits as they try to solve a murder case.