Keen Eddie follows the story of Eddie Arlette, a brash and unconventional NYPD detective who is sent to London after a botched drug bust in New York results in the loss of a significant amount of money and his partner. Forced to work with the London Metropolitan Police, Eddie finds himself an outsider in a culture he doesn't fully understand, often clashing with the rigid, protocol-driven British authorities. Despite his abrasive personality and unorthodox methods, Eddie proves to be an effective investigator. He is paired with Monty Pippin, a polite and refined British detective who serves as his foil, and he finds an unlikely ally in Fiona Bickerton, a beautiful and sharp-witted socialite who helps him navigate the complexities of London's criminal underworld. Together, they tackle a variety of cases while Eddie struggles to adapt to his new life and prove his worth to his superiors.