In the underworld darkness of 1750s London, a prostitute is brutally murdered. Novelist Henry Fielding, and his blind brother John, team up to form the Bow Street Runners, a team of brave vigilantes plotting to solve the crime.

In the wake of a reverend's brutal murder, the Runners enter a gay brothel, in search of suspected killer Thomas Deacon. Deacon may have a deadly secret - as well as a past fling with one of the Runners.

The Bow Street Runners are on the beat again, searching for the culprit of a break in at a luxurious home.

When notorious gang leader Tom Jones is busted out of jail by his Irish honchos, the Bow Street Runners are forced into danger to apprehend their man once more.

As the Bow Street Runners wind down, brothers Henry and John have bigger things in mind: a new and improved police unit, ready to take on the deadliest underworld powers in London. But to see their wishes come true, the two must take a stand against Newcastle's violent criminal gangs.