First-year Detective Kathleen Doyle is a plucky Irish redhead. Chief Inspector Michael Acton is a British lord turned cop. He's tall, handsome and enigmatic...to a fault. Acton selects Doyle out of the newbie squad to partner with him on a series of investigations because she always knows when someone is lying - a trait that comes in handy when interviewing suspects and witnesses. Acton and Doyle are sent to investigate the murder of a trainer at a racetrack.

Soon, new killings related to the first start unfolding, dragging the two into ever more perilous situations. But the real danger is the unlikely attachment that develops between the ultra reserved aristocratic Chief Inspector and his plucky working class sidekick...a relationship that will raise plenty of eyebrows-and hackles-among their colleagues at the Yard.